Kamen Rider Zi-O (Ephemeral)

Sougo Tokiwa, or more commonly known as Oma Zi-O or simply Zi-O, is an incarnation of Kamen Rider Zi-O whom has succeeded in becoming the King of the World without resistance and has since lead his Worldwide Kingdom into space; conquering much of the known Universe.

However, with Tsukasa Kadoya deciding that this Universe is not one that should exist, erased this World and caused Zi-O to become a refugee without a World to return to. This granted Zi-O the title of "Ephemeral" by most other Dimension and Universe Hoppers; One who's reign only existed for but a fleeting moment.

Jumping from Universe to Universe, Sougo began planting and gaining influence across the Multiverse until he comes across a Universe which seems becoming increasingly distorted. After realizing he had been stranded in this Universe in-between a Civil War of two Global Nations with only the most basic of his powers, Sougo determines that he must start his Kingdom anew and tread the path he had thought completed long ago.

Beginning
Ephemeral Zi-O's beginnings started much like his Kamen Rider Counterpart. He was only 18 years old when 2 Time Mazines had come to the past; One trying to kill him and the other attempting to stop the first. However this was until a man appeared in what seems to be out of thin air appeared with a Ziku Driver and the Zi-O Ridewatch in order to become the entity known as Zi-O. Attempting to hunt down and find the first Time Mazine to defeat them so they'd stop attempting to kill him, Sougo runs across a group of Orphenochs terrorizing several groups of highschoolers.

Angry at how mere abominations dare lay hands on his future subjects, Zi-O transforms without hesitation for the first time and easily dispatches the Orphenochs; killing them in a sea of Ash and White flames much to Woz's pleasure. Seeing at how readily his future King took on his role, Woz then returned to his own time into the future not fearing that his King would fail in the past.

Geiz, a future enemy of Zi-O, then appeared; revealing that he's indeed the pilot of the First Time Mazine. He proceeded to try and fight Zi-O and only proving to be equals at the time with both retreating after an extended battle.

Their next encounter was when Sougo chased a rogue Gurongi who'd been attempting to kill a friend of Sougo's in order to complete their game. Sougo, this time, pleaded with Geiz to at least let him defeat the Gurongi first before they fight once more as Innocent Lives were at stake, of which Tsukuyomi also pleaded. This moment marks the first time Geiz and Zi-O works together.

This partnership lasted for a time; defeating rogue Kaijins and foiling the plots of many "Villains" who themselves wished to rule the world with their inhuman powers. They found themselves at odds with a being known as Swartz who attempted to kill both Geiz and Zi-O at any turn possible.

It's somewhere inside this partnership where Sougo met The Lords, who successfully killed off those who were blessed with the God of Light's Seed as all Kamen Riders, in this case Agito, did not exist. They would assist Sougo and in his reign in the future.

Divergence
A week prior to Oma's Day, Sougo had met with his Mirror Self. Unlike Kamen Rider Zi-O, this Sougo found himself to be somewhat similar to his other self and their views aligned; with both selves of Sougo accepting eachother with much ease and granting Sougo his Zi-O II form.

With his newfound power, he began preparations to truly enact his plan of World Domination. Geiz would have little contact with Sougo for the upcoming days before Oma's Day.

Oma's Day
On Oma's Day, the day Zi-O was slated to become King, Sougo met up with Geiz and told him to stop worrying about Oma's Day and instead to focus on Daguva, the leader of the Gurongi who'd had made his presence known to the World. Later that day, after many hours of searching, they did find Daguva at the highest peak of Japan's Mountains.

Both Geiz and Zi-O transformed, with Daguva easily casting the two aside in their vain attempts to harm him. When all hope seemed lost, with Zi-O even losing an arm, time reversed to before the battle started with both of them just finishing their transformations. Geiz questioned what just happened before Zi-O explained that it's his new power; the power of Zi-O II. Transforming into his new form, Zi-O walked up to Daguva. Both Tsukuyomi and Geiz expected Zi-O to win against Daguva with such powers and after only a few exchanges the two began rearing up for their final attacks. However, instead of aiming for Daguva, Zi-O's Twice Time Break was headed to Geiz; killing him swiftly.

Tsukuyomi demanded Sougo to reverse time to prevent Geiz's Death, however Daguva merely laughed. At Sougo's gesture, Daguva revealed that this had all been planned and that Geiz could not and would not prevent Sougo's ascension to becoming a King. As he saw it, under Sougo's rule, the humans would potentially become even more violent than the Gurongi and wished to see Sougo lead them to conquer many planets. Tsukuyomi, in visible shock, then fled in a Time Mazine to outside of the Time Stream which Sougo allowed much to Daguva's contention.

Swartz's Death
Zi-O's conquering of the World became easy from then on. With Daguva's assistance as well as the Lords, the World's Nations including ones completely ruled by Kaijins, became one with Sougo's Kingdom.

Swartz, lacking the power he required as Tsukuyomi fled the Timeline, became increasingly powerless at Sougo's Might. In an attempt to gain power equal to that of Zi-O, he jumped to another Timeline; similar to Ephemeral Zi-O's but instead with beings known as Kamen Riders. Taking the power of the Sougo from that Timeline to form Another Gold Zi-O, he confronted Ephemeral Zi-O almost immediately as he found himself surrounded by Kaijins and Sougo himself.

Sadly, before Swartz is able to actually utilize the Another Gold Zi-O Ridewatch, Sougo raised his hand and aged Swartz; his body becoming dust to the wind. Picking up Another Gold Zi-O, he forcibly converted it into his own power; Grand Zi-O. Sougo would rule and expand his Kingdom for 14 Years before anything notable occurs.

Within those 14 years, Sougo's Grand Zi-O Form had integrated into his Ziku Driver to become his true namesake; Oma Zi-O.

Decade's Erase
After 14 years of his rule, Sougo became an intergalactic force and finding that conquering planets is becoming increasingly easy, turned to other Timelines to conquer. This caught the attention of Tsukasa Kadoya and easily determining that this World is one built on blood, went on to erase the Universe in it's entirety. Only Sougo, who had barely fled in a Time Portal to outside the Timeline, escaped.

This event merely caused Sougo to double his efforts in conquering other Timelines; jumping between them with freedom he had not seen prior as he had a home universe he was tied to. Quickly gaining influence and power once more, Sougo then set his sights on a seemingly distorted Universe; one that has holes and particularly many Dimensional Walls holding it together as if stitched together.

Zi-O: Another Story
After investigating this Universe and finding it intriguing, Zi-O then attempted to enter it. However as he entered this Universe, his belt began to seemingly glitch as if he wasn't accepted in the Universe. He thought nothing of it until he reverted from Oma Zi-O to his Base; seeing that the Grand Zi-O and Zi-O II Ridewatches became cast adrift in this timeline.

Crashing down into Planet "Earth" like a meteorite, he awoke to find himself in a crater surrounded by armed guards and mechs. It was only until they read the Katakana on his faceplate that they dropped their weapons; happily greeting the Kamen Rider as a Saviour.

Sougo, confused as to what's going on and lost in a New World without his "True" powers, played along with his new "Allies"; hiding his true intentions and acting out as a true Hero and Ally of Justice as he did with Geiz once more.

Personality
Sougo in comparison to his Canon Counterpart is significantly more malicious in his intentions; seizing his opportunity to become King at the first chance he could and not shying away from Murder as well as Sabotage to achieve his ends. His skill as a Manipulator cannot be underestimate either, as Sougo displayed no problems feigning heroic acts and a true "Goody-2-Shoes" Personality until the time was right where he could defeat Geiz; even putting on a show with Daguva in order to get Geiz's focus on Daguva rather than on Zi-O on Oma's Day.

Abilities

 * Master Manipulator: Sougo has an uncanny talent for Manipulating others even to the point of causing Geiz, someone who believed Sougo to be a heartless monster, to be a true Paragon of Good and instilling hope in him that he would become a True Benevolent Ruler in the future.
 * Time Manipulation: At first unstable, Sougo's Time Manipulation capabilities completely surfaced once he merged with his Mirror Self. This allows him to become immune to Temporal Paradoxes, Reverse, Stop, Slow and Speed up Time as he wishes, and notably, peer into the Future as well as Warp Reality to make those Futures actually occur should Sougo wish.
 * Dimensional Wall Manipulation: As an Anomalous Entity without attachments to a Universe, Sougo is able to Manipulate and Summon Dimensional Walls as he sees fit, albeit not to the extent of Tsukasa Kadoya.

Trivia

 * It is unknown why, when kamen Riders don't exist in this Universe, Zi-O still has the Katakana for "Kamen Rider" that makes up his faceplate.