Anzu Izumi

1= "You're in for a big surprise!"

- G7 Type-S's catchphrase before a battle.

2= "Hyougetsu Toppa!"

- G7 Type-S Frost's transformation call

3= "White Iron Spider, Kamen Rider G7 Type-S!"

- G7 Type-S's roll call in Go-Onger 10 YEARS PRELUDE feat. Build

4= "You guys are going to be dead anyway."

- G7 Type-S catchphrase after using a finisher, but before the damage takes effect.

5= "Feel the chill of your own despair!"

- G7 Type-S Frost's proclamation before a finisher

Anzu Izumi (泉 杏子) is Kamen Rider G7 Type-S (仮面ライダーG 7タイプS(エス)), the Secondary Rider of Metroid: Kamen Rider Generations Vol. 3: Fates Intertwined. She is the older sister of Goro Izumi who mysteriously disappeared several months before his birth and 27 years before the events of the story. After she was found by an elder of a ninja clan, she was gifted with the power of lightning-elemental ninja arts. About 10 years later, she was abducted by scientists and became one of the first victims of their experiments. As the very first patient zero to be injected with the original Nebula Gas, Anzu was referred as Test Subject No. 0 (被験者ナンバ0), or simply Number 0. she managed to escape and she subsequently encounters the Space Demon Clan Kamui Tribe leader Shingetsu.

During her time with the Kamui Tribe, she briefly took on the name Rakurai (落雷) and became Shingetsu's right-hand woman, and is feared by many with her moniker of the Goddess of Thunder (雷の女神). She becomes the interim leader of the Kamui Tribe when Shingetsu sets out on a journey into to capture. Her true agenda is revealed that she has a strong hatred towards Faust and seeks eliminate everyone connected to the evil organization and uses the Kamui Tribe as a front for her revenge schemes.

Following the final battle against Kaguya Kozuki and, Anzu now works alongside her brother in ZETA Technology Industries, now the chief of the research and development department after Natsuki Nakajima, the former R&D chief was promoted to CEO, while her brother is now the executive vice president. During the events of Engine Sentai Go-Onger: 10 YEARS PRELUDE feat. Kamen Rider Build, she later obtains a and gains the ability to transform into Kamen Rider G7 Type-S Aqua (仮面ライダーG 7タイプSアクア) using the Aqua Mermaid Fullbottle and the G7 Aqua Visor.

Appearance
Rakurai is a human woman donning a black, skintight body suit, futuristic-style ninja armor. Her most distinguishing feature is her clothed mouth covering has a skull pattern. She carries a long ninja sword around her back in a similar way Shingetsu carries his large sword.

Without her mask, Anzu has a long, apricot-brown colored hair at the length reaching her shoulders. The color of her hair is likely a reference to her given name.

By the time of the war between Touto and Hokuto, Anzu cuts her hair into a bob, and dyed black. She later discards her skimpy shorts and jacket in favor of wearing a pink Cheongsam (Chinese dress).

Past
Anzu was born in 1980, as such she is the first-born daughter of Toshihiro and Honoka Izumi. At the age of 10, she stumbled into an accident during a trip to the beach and disappeared from the sight of her parents. Her disappearance caused her parents to sink into depression while her mother was still pregnant at that time. From the day Goro was born, her disappearance was kept secret from Goro until his coming of age when he finds out his father's video diary, apologizing to him that they bear the guilt of lying to him about being the only son by keeping Anzu's mysterious disappearance a secret.

Anzu was found washed ashore by a ninja clan elder, but still remembers the accident and is lost from her family. She was taught the ways of the ninja by the elder, who eventually raised her as his own. During her time being trained as a ninja, Anzu saves the young Goro from death after witnessing their car accident from a distance. 7 years later, her master was killed and is subsequently abducted by. Months after the, Anzu became one of the first victims Faust's experiments. However, she manages to escape from Faust's hideout when the government raided the hideout under the orders of.

Sometime later, she encounters the Space Demon Clan Kamui Tribe leader Shingetsu, who was visiting the Earth in search of. Impressed by her ninja skills and superhuman abilities granted to her after she was experimented by Faust, Shingetsu offers her to join his faction. She accepts, with the intent to seek revenge against Faust. While Shingetsu focuses on his goal to get Pandora Box, Anzu, now taking up the name of Rakurai, uses the Kamui Tribe as a front to kill the people connected to Faust as an act of revenge.

Personality
1="And that's why kindness was just a facade! You are not aware that Faust is sending those kinds of people taking advantage of you, as they are taking advantage of 's research to exploit that Rider System as a tool for warfare! This is why you should be careful of trusting someone just because they are kind enough to help you find the missing pieces of your lost memories, in the end you'll end up being a pawn to their plans and won't hesitate to kill you once they have no use for you!"

- Anzu to about Sawa Takigawa after she reveals about her part of the latter's apparent death.

2="Seriously, I can't believe my brother and that knucklehead of a scientist are Best Match maniacs! This is kinda nostalgic when I was once a to  who's also called a "Gattai" maniac. Anyways, don't answer when you do know who that is!"

- Anzu's demonstration of medium awareness

3="This is all my fault. If only I did not trusted Shingetsu in the first place. I did not realize that Shingetsu was an egomaniacal sociopath only after Pandora's Box, and would go in lengths to kill people. Now, he's really willing to betray anyone so he can get what he wanted. And, my thirst for revenge almost turned me into the same ruthless sociopath as Shingetsu."

- Anzu realizing the pointlessness of her actions.

4="Goro... I broke my promise to you... I unwillingly gave into my urge to get revenge... I didn't know that I only made things worse... It's horrifying! I'm scared!" "I know. You must always remember the consequences of dedicating yourself to revenge; you will only do nothing but make yourself suffer and endanger people around you." "I also didn't know what it's like to lose somebody I love and care because of that. I was horrified of how was killed right before his eyes! I've done so many things I can't take back... I'm sorry...so sorry! I'm such a fool!"

- Anzu to Goro, breaking down after she attempted to kill.

5="I hope enjoy a LONG hospital stay!"

- Anzu before she sends Sosuke Esumi flying after the latter constantly follows her.

Anzu is viewed in flashbacks as a child before Goro's birth as a sweet little girl, and is sometimes spoiled, which contrasts to her brother who is responsible and a prodigal genius. Anzu's sudden disappearance lead to her parents suffering depression and keeping her disappearance a secret from Goro; that is until that their father admitted that he lied to Goro in his video message through a video diary.

At first glance, Anzu, as Rakurai is incredibly arrogant, unpredictable, and a ruthless assassin, and prefers to use sneak attacks to confound her enemies; as most ninjas are supposed to do. She is a stark contrast to Taki and is the total opposite of her in every way, right down to her cockiness and lack of empathy. She barely shows any emotion due to her mouth concealed by her skull mask.

At first, she was initially shown to be loyal towards Shingetsu. However, it turns out that her motivations of joining the Kamui Tribe contradicts all this, even Shingetsu knows her reasons she joined the group with a goal in mind: Anzu is driven with desire for revenge against for experimenting her; and she will do whatever it takes by eliminating the people connected to the evil organization as revenge by proxy like orchestrating the deaths of  (although she faked Sawa's death by switching her with a body double to fool Sento) and  at Shingetsu's hands and is willing to lie and manipulate anyone to achieve her plans (including Shingetsu himself, in which he is aware of) with little to no concern for the consequences of her actions.

Despite her brunt, brutally honest, manipulative, and cold behavior, she also appears to be playful, bubbly, as well as immature and childish, as shown with her affection towards her brother. Depending on situations, she also has a flair of leaning on the 4th wall; in a similar vein with and. Anzu has an unladylike speech pattern, even using masculine pronouns like 僕 when referring to herself. Just like her own brother, Anzu is one of the few characters to swear and showcased vulgar and offensive behavior to others at the same time bordering in gallows humor; one such example has her making comments about Sawa getting her "corpse" raped, drawing the ire. Much like Goro, she was frequently shown to be foul-mouthed, repeatedly swearing in almost every chapter. She is very cunning and intelligent, she is also able to forge her own weapons and equipment.

Similarly with Goro, Anzu is prone to do morally-questionable actions; but to unscrupulous extremes like using anyone as a means to an end, and putting innocent lives in grave danger for the sake of her revenge, much to her brother's disapproval. Even after defecting from the Kamui Tribe, Anzu still maintains the same sociopathic behavior under her Rakurai alias, especially in regards towards anyone connected to Faust. As quoted above, she even gloated to Sento's face that she felt no guilt in manipulating Shingetsu into "killing" Sawa. It is likely that Faust's experimentation done to her is the cause of her vengeful, manipulative, and sociopathic personality.

However, the only person she wouldn't use as a tool for her plans is her brother, Goro; whom she genuinely cared. Anzu is revealed to be protecting him from the shadows after being trained as a kunoichi, even Goro himself is unaware of her masquerading as a Kamui Tribe ninja. It also shows that Anzu has a good reason to join the Kamui Tribe not out of revenge against Faust, but also to protect Goro. Eventually, she decided to cast aside her thoughts of revenge, choosing to redeem herself after she earns the disapproval from Sento and his friends because of her actions, and lastly her actions turned her into the same ruthless and sadistic person as Shingetsu.

Anzu is also anti-social and paranoid whenever her self-serving goals of revenge is concerned. Her paranoia is as similar to that of her brother at the mere mention of her past being experimented on by Faust. Her vengeful personality relapses after finding out survived his apparent death, and even attempted to kill him. However, Goro was able to stop her before she herself would eventually become as evil as Gentoku. Ultimately, Anzu comes to realize the foolishness of her desires for revenge will only do worse than good for her part, knowing that she would end up losing people important to her if she is not careful, and even cried to her brother in regret and admitted she could not control her hatred and letting it blind her morality. This is made apparent when she is horrified with Ryohei Kusanagi, the man who helped her escape from Faust's laboratory, in his descent into insanity after he kills Gentoku in the proxy battle made her reflect on her past actions and fearing she might end up like Kusanagi if she had not let go of her quest for revenge.

Anzu can be violent and quick-tempered if aggravated enough, due to her aforementioned paranoid disposition, when on her own, she asks anyone not to follow her. Something that found out the hard way when she sends him flying after stalking her for long periods of time. As such, this makes her the exact opposite to, who is physically identical to Anzu. While Anzu and Miu are similar by appearance, their similarities end in terms of their personalities: Miu is prim, proper, level-headed and graceful, whereas Anzu is defined by her rough, boyish, temperamental and unpredictable nature.

By the time the war for the Pandora Box broke out, Anzu also shares her brother's determination to stop the war by any means necessary. For that matter, she even decided to continue her quest to hunt down the people who are connected to Faust and Namba Heavy Industries. Since then, her drive to become a Rider is to fight to end the war and find the meaning of protecting others.

Powers and Abilities
1="4th of July 2014 This is a record of our first human experiment of Nebula Gas. The test subject is a woman in her 30s, with an apricot-brown hair and a height of 5 foot 6. When the first time we injected Nebula Gas on this woman, as what I was warned about by  the gas can turn humans into monsters. This discovery left me and my colleagues in shock... Her appearance remains the same, as if she managed to overcome the painful effects of the gas. The test subject appeared to have retained her humanity. However...  One of my colleagues came contact into the subject, and had somehow lost control of himself and turned into a monster as what we christened as a . The test subject, in turn got out of the Nebula Gas incubator and managed to kill the monster. From that point onward, we referred her as Test Subject Number 0, because of the original Nebula Gas in her body, she could likely turn anyone into Smash on contact. As a result, the Nebula Gas in her body is proven to be dangerous."

- 's records of the Nebula Gas experimentation on Anzu

2="Hazard Level: Infinity (∞): This is Number 0's Hazard Level. Due to the original Nebula Gas in her system, her Hazard Level is very difficult to measure. Which leaves us to find that out in our imagination. However, her powers are too dangerous for us to control at first, as one of my co-workers suddenly mutated into a Smash upon coming contact to her. [...] We also found out that she can inject anyone with Nebula Gas on contact, which gives them Hazard Levels higher than analogous to the above."

- 's records of the nature behind the original Nebula Gas in her body


 *  ∞ (Infinity): Anzu has a very immeasurable Hazard Level that surpasses, , , and . This is due to the fact that Anzu is one of the first victims of Faust's experiments in which it was overseen by at that time before the Touto government raided Faust's hideout under Gentoku Himuro's orders. Even in this Hazard Level, Anzu is also able to use either ,  or . It is also possible for her to operate the  due to her high Hazard Level.
 * Original Progenitor: According to Goro and Sento, Anzu is the closest thing to a patient zero due to having a high amount of Nebula Gas administered to her. She can inject anyone with Nebula Gas, granting them a Hazard Level ranging from 2 to 50 and higher. However, Anzu is able to fully control the Nebula Gas within her body.
 * Nebula Gas injection: Anzu has the ability to inject anyone with Nebula Gas on contact. Giving them a Hazard Level higher than the implemented levels. Unlike other conventional methods of injecting the gas, the Nebula Gases in her body appear to be non-lethal as a result of her being able to control the gases inside her system. The gas she injected on her recipients can also spread to others on contact.
 * Smash Mutation (implied/formerly): After being injected with the original Nebula Gas, Anzu had an ability to unwittingly turn anyone into a Smash upon contact.
 *  Compatibility: Anzu is one of the few people to be unaffected by the Sclash Driver's side-effects after each transformation such as the obsession of fighting. Granted, this is due to the fact that she has indefinite amounts of Nebula Gas injected into her body at the same time her Hazard Level being immeasurable. At the same time that the G7 system negates the effects of the Driver, since the G7 suits serves as the antithesis  created.
 * Ninja Skills: After she was taken by a ninja clan elder, Anzu was gifted with the skills of a shinobi.
 * Tengokuryu Ninpo (天獄流忍法): Having taught Tengokuryuken before her disappearance and Goro learning this fighting style, she incorporates this style with her ninja skills. Anzu emphasizes defeating her opponents with a delayed-time effect.
 * Fullbottle Augmentation: By using a Fullbottle in her hand without transforming, Anzu can gain abilities based on said Fullbottle's traits:
 * Spider: A thin, gooey thread is shot from the Spider Fullbottle's Shielding Cap, forming a spider web. Trapping anything that touches the web.
 * Yuki-Onna Super: After twisting the Fullbottle's Shielding Cap face forward, it alters the weather, turning a bright sunny day into a snowy winter. Depending of the usage, Anzu can call upon a violent snowstorm or a hail. This snow/cold weather manipulation will last after Anzu de-transforms from her G7 Type-S Frost form.
 * Toxigenesis: Keeping with her Rider form's spider motif, Anzu can generate neurotoxins made from her internal Nebula Gases. She can inject these venom by striking her opponent's pressure points that can instantly kill her victims. It is stated that her poison is even more powerful than . Some of her finishers usually accompany this paired with the aforementioned time-delayed attacks.
 * Neurotoxin Manipulation: Anzu can also control the poison she injects on her victims aside from killing them. She can use to spread the venom into her enemy's body to paralyze them. Making it more similar having a tumor being implanted into the human body.
 * Necromancy: Anzu is also revealed to learn how to bring back from the dead as reanimated corpses to do her biddinig. But, to do so, she requires a living sacrifice as the vessel for the soul of the deceased along with the DNA they intend to revive, restoring them as they were when they were alive in order to do their summoner's bidding. However, the deceased individual will only have 100 days before they the accomodated number of days will be expired. When revived, the reanimated corpse will appear grey and in a state of minor decay: marred by cracks and other flaws; such as in the case of, disobeying the summoner's bidding. The living corpse cannot be killed since due to being already dead, they can still experience pain when attacked or force of impact such as powerful finishing attacks.
 * Hazard Level Ability Restriction: Being the creator of the Arc-Winger, and by extension, G7 Icarus XYZ's Archangel Armor. Anzu can seal certain abilities of a Smash, Build Driver, and/or Transteam Gun user when transformed as G7 Icarus XYZ Archangel Armor.
 * Hazard Level Reduction: When using G7 Icarus XYZ's Archangel Armor, Anzu gains the ability to permanently de-power anyone with a high Hazard Level upon contact by neutralizing the effects of Nebula Gas of the target's body, reducing their Hazard Levels to 0. It also applies when G7 Icarus XYZ inflicts melee damage against a Smash or anyone using a Build Driver, Sclash Driver, or Transteam Gun, etc., the target's Hazard Level is permanently reduced.
 *  Nullification: According to Anzu herself, the Archangel Armor is designed to disable the Transteam System. This is paired with the armor's ability to decrease the opponent's Hazard Level upon contact, rendering the usage of the Transteam Gun useless.
 * Holographic Disguise: Sometime after bringing the Go-Ongers to the, Anzu modified her Sclash Driver which allows her to use holographic technology to disguise herself. She can take form of her identical counterpart, in order to fool the other.

Weakness

 * Aging decline: It is revealed that the experiments done to Anzu by Faust caused her body to cease aging, making her look like she is physically 27 years old but she is actually 37 years old.

Devices

 * - Transformation belt
 * - Transformation trinket
 * - Auxiliary trinkets
 * G-Bracer - Transformation device to access G7 Type-S Frost with the Yuki-Onna Super Fullbottle.
 * - G7 Type-S's personal smartphone that can transform into the Machine Builder. Created by reverse-engineering Build's original one.

Arsenal

 * XGN-009 Super Denjinmaru - G7 Type-S's primary weapon upgraded from her original Denjinmaru ninja sword.
 * - G7 Type-S's sidearm and secondary weapon.
 * - G7 Type-S's weapon granted by the Kaizoku Fullbottle.
 * - G7 Type-S weapon granted by the  (and/or ) Fullbottle.

Vehicles

 * - Rider Machine shared with Build and Cross-Z.

Family

 * Toshihiro Izumi - Father
 * Honoka Izumi - Mother
 * Goro Izumi - Brother, Kamen Rider G7 Icarus (XYZ)
 * Takagi Izumi - Grandfather

Relationships

 * Family
 * Goro Izumi: Her little brother. Goro is the only person that Anzu deeply cares about, and protects him from the shadows until his coming of age. At first, Goro sees her as an enemy due to her hiding her identity as a ninja of the Kamui Tribe. That is, she reveals herself to him during the siege of the Touto Institute by Faust. Both brother and sister are at odds with each other due to the fact that Goro disapproves her desire for revenge against Faust. Because of her familial love towards Goro, she could not bring herself to use him as a pawn for her goals.
 * Space Demon Clan Kamui Tribe
 * Shingetsu: Anzu first met Shingetsu during his first visit to Earth in search of Pandora Box. She accepts his offer to become his right-hand. While Shingetsu journeys in Touto to find Pandora Box, Anzu uses the Kamui Tribe as a front to eliminate the people who are linked to Faust. Shingetsu is even aware that Anzu uses him as a means to an end to bring Faust down to its knees, yet he doesn't harbor any ill will for her actions and gleefully grants her wish.
 * Space Explorers
 * Although they don't interact much, Anzu and Mayu share a lot in common. Both wanted to get revenge on a  that transpired a tragic incident in their lives - Anzu towards Faust for experimenting on her with Nebula Gas, and by proxy its former leader, Gentoku. Mayu towards Medusa for the deaths of her parents and twin sister, Misa Inamori. Ultimately, both realized the futility of their actions: Anzu eventually concludes the pointlessness of her quest for vengeance after Goro stops her from attempting to kill Gentoku for the second time, the latter of whom was still a prisoner of war of Hokuto. While Mayu also realizes that both her and Medusa were nothing but pawns to, the same person who made Mayu into Kamen Rider Mage.
 * Although they don't interact much, Anzu and Mayu share a lot in common. Both wanted to get revenge on a  that transpired a tragic incident in their lives - Anzu towards Faust for experimenting on her with Nebula Gas, and by proxy its former leader, Gentoku. Mayu towards Medusa for the deaths of her parents and twin sister, Misa Inamori. Ultimately, both realized the futility of their actions: Anzu eventually concludes the pointlessness of her quest for vengeance after Goro stops her from attempting to kill Gentoku for the second time, the latter of whom was still a prisoner of war of Hokuto. While Mayu also realizes that both her and Medusa were nothing but pawns to, the same person who made Mayu into Kamen Rider Mage.
 * Although they don't interact much, Anzu and Mayu share a lot in common. Both wanted to get revenge on a  that transpired a tragic incident in their lives - Anzu towards Faust for experimenting on her with Nebula Gas, and by proxy its former leader, Gentoku. Mayu towards Medusa for the deaths of her parents and twin sister, Misa Inamori. Ultimately, both realized the futility of their actions: Anzu eventually concludes the pointlessness of her quest for vengeance after Goro stops her from attempting to kill Gentoku for the second time, the latter of whom was still a prisoner of war of Hokuto. While Mayu also realizes that both her and Medusa were nothing but pawns to, the same person who made Mayu into Kamen Rider Mage.


 * CR
 * Enemies
 * Although she hasn't met him in person. Due to him being the leader of Faust and his identity of Night Rogue, Gentoku is one of Anzu's potential targets that she intends to eliminate. She even revealed to her brother, Sento, and Banjou that she orchestrated Gentoku's inevitable death. However, with him surviving his apparent death, Anzu's hatred towards didn't change at all. Eventually, she along with Goro settle a truce with him against Kaguya.
 * Elpis Corporation
 * Kaguya Kozuki: Just like her brother, Anzu both despises and looks down on Kaguya. She herself is also aware of her connection with not just with Ryohei Kusanagi, but also to Takumi Katsuragi. Her hatred towards Kaguya grew even worse when she also hears the truth about her from Soichi Isurugi, and Ryohei's death at the hands of his own ex-wife.
 * Anzu is somewhat hostile towards Sento, this is due to the fact that she engineered Sawa's apparent death. Even though she reveals that Sawa is still alive, Anzu continues to look down on Sento with disdain. This has become apparent after she and her brother find out his identity being . When she begins to notice Goro attempting to kill Sento after the revelation of his true identity in revenge for experimenting on her sister, Anzu decided to intervene and reminded Goro that if he kills Sento, he would end up in the same path Anzu was. During Hokuto's invasion of Touto, Anzu appears to be going along with her brother's act opposing Sento. Once Build succeeds in defeating Grease, she and Goro dropped the act.
 * As with Sento, Anzu looks down at Banjou with disdain, and even reminds him what it means to get revenge on Faust because of what they did to . Later on, after being warned by Sento and Banjou, as well by Goro, Anzu decides to let go of her revenge. After she and Goro aligned with the Hokuto government during the first phase of the war for Pandora Box, she is the only one besides her brother who informed Banjou that their betrayal was a ruse.
 * When Sawa was captured by Shingetsu, Anzu fakes the former's death by using a body double to fool Sento and taking her into the Kamui Tribe's mothership in outer space where she was held prisoner momentarily before she, Goro, and the Space Explorers freed her. However, upon learning the truth about Sawa being one of the Namba Children, Anzu started to become more suspicious of her. After Sawa gets captured by Elpis Corporation, Anzu callously says that she could care less about Sawa anymore. However, Anzu relented on her words and much like Goro, actually pretended not to care about Sawa because Goro blamed himself for being unable to stop Elpis Corporation from holding Sawa into their custody.
 * Hokuto government
 * Prior to becoming Prime Minister and corruption by Pandora Box, Anzu also knows Prime Minister Tajimi because of her parents' friendship with her. She eventually lost all respect from Tajimi as she is increasingly drunk with power of the box.
 * Her interactions with Sawatari are on respective terms. Both her and her brother served as moral compasses to both him and to the rest of the Hokuto Three Crows.
 * It seems Akaba has high regards and respect towards Anzu, and even addressed her with the "-sama" honorific.
 * Others
 * Taki
 * Natsu
 * Reiji Matsushima: Much like his interactions with the rest of Goro's party, Reiji is often met with skeptical hostility with Anzu at first. However, when Reiji fell into depression upon learning the dark truth about Kaguya, Anzu is one of the few people alongside her brother to encourage Reiji to fight for what he believes in. When Goro is mostly fighting on his own, Reiji would also aide her in his place.
 * Ryohei Kusanagi: Kusanagi was the one who helped Anzu escape from the laboratory after she was injected with Nebula Gas before Gentoku initiated a raid where Katsuragi was caught in the act of doing human experimentation. When Ryohei later resurfaced as the Kerberos Smash with the intent of killing Gentoku for revenge, Anzu wpuld go in desperate heights to him from going off the deep end, that is until she and Goro were able to revive Sento and help him unlock RabbitRabbit and TankTank forms to defeat him. Kusanagi would eventually realize his wrongs thanks to her, and later his biological daughter, Sayaka. In his last breath, he admits to Anzu that his desire for revenge turned him insane, something that she herself considered that as her greatest fear.
 * Both Anzu Izumi and Miu Sutou are identical by appearance, but their personalities contradict towards one another.
 * Taki
 * Natsu
 * Reiji Matsushima: Much like his interactions with the rest of Goro's party, Reiji is often met with skeptical hostility with Anzu at first. However, when Reiji fell into depression upon learning the dark truth about Kaguya, Anzu is one of the few people alongside her brother to encourage Reiji to fight for what he believes in. When Goro is mostly fighting on his own, Reiji would also aide her in his place.
 * Ryohei Kusanagi: Kusanagi was the one who helped Anzu escape from the laboratory after she was injected with Nebula Gas before Gentoku initiated a raid where Katsuragi was caught in the act of doing human experimentation. When Ryohei later resurfaced as the Kerberos Smash with the intent of killing Gentoku for revenge, Anzu wpuld go in desperate heights to him from going off the deep end, that is until she and Goro were able to revive Sento and help him unlock RabbitRabbit and TankTank forms to defeat him. Kusanagi would eventually realize his wrongs thanks to her, and later his biological daughter, Sayaka. In his last breath, he admits to Anzu that his desire for revenge turned him insane, something that she herself considered that as her greatest fear.
 * Both Anzu Izumi and Miu Sutou are identical by appearance, but their personalities contradict towards one another.
 * Both Anzu Izumi and Miu Sutou are identical by appearance, but their personalities contradict towards one another.
 * Both Anzu Izumi and Miu Sutou are identical by appearance, but their personalities contradict towards one another.

Ridewatch
G7 Type-S Ridewatch (G 7タイプSライドウォッチ): Based on Kamen Rider G7 Type-S, this would provide access to the G7 Type-S Armor.

Portrayal
Anzu Izumi is portrayed by Yumi Sugimoto (杉本 有美), best known for her role as  in , which now becomes a dual role in . As Kamen Rider G7 Type-S, her suit actor is Gomi Ryōko (五味 涼子).

Exclusively to this story, this is second time where Yumi Sugimoto plays a sibling in tokusatsu, with the first being Miu Sutou. Ironically, she is portrayed as the older sister of the protagonist who is not aware of her familial relationship towards him. To emphasize this even further, Yumi Sugimoto is currently 28 years old (while her character in this story is 37 years old, though she is physically 27 due to Anzu being experimented by Faust halted her body from aging), whereas Taishi Nakagawa (the actor for Goro Izumi) is 19, despite his character being 27 years old.

Etymology
Her given name translates as "apricot", referencing her former hair color. While her alias of Rakurai the same as Japanese name of the Pokémon Electrike. Coincidentally, both are associated with lightning. Electrike is an Electric-type Pokémon, while Rakurai is efficient with lightning-elemental ninja arts.

Her alias of Shirahane translates to "white wings", sharing the main Hokuto Three Crows' color theme with Akaba (赤羽 lit., "red wings"), Kiba (黄羽 lit. "yellow wings") and Aoba (青羽 lit., "blue wings"), as well her brother's alias of Kuroba (黒羽 lit., black wings), hence his rider form being white. Incidentally, her alias also translates to "white rain" (白羽根).

Of note, Anzu is the only "member" of the whose pseudonym doesn't end with "-ba".