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 * For his Bujin counterpart, see .

Adam Winters is Kamen Rider Decade, who is one of the supporting characters of the.

Personality
Adam is very ambitious, ruthless, charming, cheerful, kind, caring, brave, charismatic, selfless, hyperactive, enthusiastic, sarcastic and smart sense of humor, a laid-back demeanor, and has earned the respect of most people, making jokes about needy every situation, even in the face of certain death, to the annoyance of both friends and enemies. His reasons for this vary: either he wants to relieve the stress of a situation, or simply because he wants to hide how scared he really is during a crisis. It is generally agreed, however, that whenever a life is in danger, he will stop telling jokes, and become serious and demanding when the situation called for it. He regularly used his name as a threat, which only rarely worked, despite his apparent expectations.

Adam is told by many people that is brave such as friends, family, strangers and even his enemies. He also states that he has "brooding" look, that always branded him a rebel. It is mentioned that even though he is smart, he doesn't always see the obvious even when it is right in front of him, such as people's feelings and what they are trying to see indirectly. His selflessness and sense of duty causes him to try and shoulder the burden alone rather than involve others, whether he can carry that burden or not. This altruism intensifies the guilt he feels for his role in deaths that follow him. While generally calm and composed, he is prone to making poor judgement during emotional turmoil. He occasionally relapsed though. He tended to keep a massive smile on his face and simply enjoyed his journeys through the worlds.

Adam is willing go to extreme lengths to save those close to him, caring a great deed for his friends. He is also shown a merciful and compassionate nature, consistently extending an offer to help even his most dangerous enemies before putting a stop to their evil deeds. However, when his patience reached its limit or his enemies were duplicitous, they received no mercy or second chances. He would also try to avoid harming those who were not in control of their actions, as well as defend them from their captors or those who would cause them further harm. However, when defeating the enemy would cost him his own life, he was much more hesitant, unless it meant saving a friend. He is a strong willed individual, whatever obstacles that comes his way, if it's relationships, being misunderstood, or someone dying on his watch, he always gets back up. His indomitable will and don't give up attitude usually pushed him to do amazing feats.

Despite being considered a good person, he didn't think of himself as one, seeming more susceptible to changes in personality; he grew more vicious, unforgiving, and developed a short temper when he didn't have company to restrain his dark side. He also has a capacity for righteous anger, particularly when his friends are threatened or at risk, and when driven by his anger, he will not hesitate to strike down those who opposed him. He felt profound regret for the deaths he'd seen. His keen sense of loss led him to empathise with those who had also suffered, and feel driven to prevent death and destruction wherever possible, having a hard time accepting failure. Many people noted the reason he required a friend is to keep him from succumbing to his darker side.

Powers and Abilities

 * Imagination: Being one of the few adults possessing imagination, he can see the Ressha of the ToQgers.
 * Genius-Level Intellect: Adam possesses a very sharp mind, aware of to his surroundings, able to determine much of the events that transpired from it. He is extremely intelligence, as he quickly showed a natural understanding and quick capacity to learn. He is able to analyze environments and predict every inch of it. He has an advanced knowledge of physics, and developed several of Decade's accessories on his own.
 * Enhanced Memory: Given his extraordinary level of knowledge and understanding of science, he most likely possesses an eidetic or photographic memory, which allows him to process and utilize his vast intelligence effectively.
 * Genius Physicist: Adam has an advanced knowledge of physics, having finished a difficult physics test with perfect results.
 * Genius Engineer: Adam has built the majority of Decade's accessories on his own.
 * Master Tactician/Master Detective: Adam is also a capable tactician, observation, forensic investigation, and inductive and deductive reasoning of the highest caliber.
 * Master Hand-To-Hand Combatant/Martial artist: Adam is considerably very skilled hand-to-hand combatant and martial artist. His style shows advanced skill in wing chun, systema, taekwondo, capoeira, kali, muay thai, boxing, hapkido, judo, ninjutsu, karate, krav maga, silat, wrestling and sambo.
 * Master Weaponry: Adam is proficient in handling any melee weapon or firearm such as Gun, Bo-Staff, Knife, Tomahawk, Kunai and also Sword.
 * Free Running/Acrobatics: Adam is an accomplished acrobat, capable of scaling buildings, and running from rooftop to rooftop with ease. He is maneuverable and graceful, able to pursue and outrun a target in various types of terrains. His skills allow him to fluidly dodge and attack from different directions without losing balance.
 * Game Proficiency: Adam is highly adept in the field of video gaming, both in creative concept and actual practice. He is a masterful gamer with gaming skills formidable enough to see through the loopholes and weaknesses of every game and figuring out the methods of clearing them. These skills are greatly enhanced when he enters a state of emotional rage or frustration.
 * Indomitable Will: A driven and determined person, Adam is nearly fearless and almost never gives up under most situations. He possess the ability to withstand the temptation of free wishes that the Imagin offers and can expel them whenever he is in consciousness. He is also resisted to telepaths who can read and control his mind, as well as most methods of brainwashing.
 * Stealth Expert: Adam is very elusive. He can sneak in and out of most guarded buildings without being detected, follow his targets for long periods of time unnoticed, and quickly disappear from sight even in broad daylight.
 * Talented Musician: Adam showed that he has a talent of playing many instruments, including a piano, a guitar, a flute, a trumpet and even a violin solo similar to those of and.
 * Culinary Expertise: Adam is a talent cook with many praising his culinary skills in various styles.
 * Expert Medic: Adam is shown to be an expert in medical care, as he was a doctor for an six years.
 * Telepathic Communication: Adam is able to remotely communicate with others.
 * Sleep Sedation: Adam has the ability to render others unconscious with nothing more than a wave of his hand.
 * Dream Walking: Adam can enter anyone's dreams to communicate with them.
 * Mediumship: Adam can see and communicate with souls.
 * Accelerated Healing: Adam heals faster than humans to the point of completely healing from a near-fatal wound within a day. His healing ability is so advanced that he can completely regrow lost limbs within a short amount of time.
 * Decelerated Aging: This also enhances his vitality, drastically reducing his aging process while extending his health and longevity.
 * Interdimensional Travel: Adam can travel within worlds via.
 *  Abilities: Due to having no real home of his own, whenever Adam travels to another world, he takes on a role within it, granting him different abilities as well as all necessary needs to take on that role (IE clothes, documents etc.). Among these abilities are:
 * Omnilingualism: Adam can speak and understand many languages, including French, Japanese, and.
 *  Vision: Adam can see any when they are in Clock Up, which is supposedly impossible to be sighted by normal humans due to them moving at the near lightspeed.
 *  Travel: Adam can enter and survive within the Mirror World without the need of an . Normal humans would usually be dead once they tried to return to the real world.
 *  Empowerment: Adam has the ability to use the Ongekibou, as shown using it in a pair of.
 *  Travel: Adam can enter the Underworld without the need of an Engage Wizard Ring.
 *  Immunity: Adam has the ability to be somehow unaffected by slowdown, even super slowdown.
 * Time Bypass: Adam can bypass the time stopping ability used by Cronus, similar to Hyper Muteki.

Devices

 * - Transformation device.
 * - Gives Decade the powers of previous Showa and Heisei Kamen Riders, depending on which card used.
 * - Decade's device that allows him to transform into Complete Form.
 * - Decade's personal smartphone that can transform into the Machine Decader or any Rider Machine.
 * - Decade's mini-support robots.
 * - A device that deploys minidrones.
 * - A stethoscope-like device.

Weapons

 * - Decade's primary weapon and essential for holding Rider Cards.
 * - Weapons of past Kamen Riders accessed through Kamen Ride, Form Ride and Attack Ride cards.
 * - Decade's personal weapon as Kamen Ride: X.
 * - Decade's personal weapon as Kamen Ride: Black RX.
 * - Decade's personal weapon as Form Ride: Black RX Robo.
 * - Decade's personal weapon as Form Ride: Black RX Bio.
 * - Decade's personal weapon as Form Ride: Kuuga Dragon.
 * - Decade's personal weapon as Form Ride: Kuuga Pegasus.
 * - Decade's personal weapon as Form Ride: Kuuga Titan.
 * - Decade's personal weapon as Form Ride: Agito Storm.
 * - Decade's personal weapon as Form Ride: Agito Flame.
 * - Decade's summoned Contract Monster as Kamen Ride: Ryuki, accessed through Attack Ride: Advent.
 * - Decade's personal weapon as Kamen Rider: Ryuki, accessed through Attack Ride: Sword Vent.
 * - Decade's personal weapon as Kamen Rider: Ryuki, accessed through Attack Ride: Strike Vent.
 * - Decade's personal weapon as Kamen Rider: Ryuki, accessed through Attack Ride: Guard Vent.
 * - Decade's personal weapon as Kamen Ride: Faiz.
 * - Decade's personal weapon as Kamen Ride: Kaixa.
 * - Decade's personal weapon as Kamen Ride: Blade.
 * - Decade's personal weapon as Kamen Ride: Hibiki, accessed through Attack Ride: Ongekibou Rekka.
 * - Decade's personal weapon as Kamen Ride: Kabuto.
 * - Decade's personal weapon as Kamen Ride: Den-O.
 * - Decade's personal weapon as Form Ride: Kiva Garulu.
 * - Decade's personal weapon as Form Ride: Kiva Basshaa.
 * - Decade's personal weapon as Form Ride: Kiva Dogga.
 * - Decade's personal weapon as Form Ride: Ixa Burst.
 * - Decade's personal weapon as Form Ride: Rising Ixa.
 * - Decade's personal weapon as Kamen Ride: Skull.
 * - Decade's personal weapon as Form Ride: Double HeatMetal.
 * - Decade's personal weapon as Form Ride: Double LunaTrigger.
 * - Decade's personal weapon as Kamen Ride: OOO.
 * and - Decade's personal weapons as Kamen Ride: Fourze.
 * - Decade's personal weapon as Form Ride: Fourze Elek.
 * - Decade's personal weapon as Form Ride: Fourze Fire.
 * - Decade's personal weapon as Kamen Ride: Wizard, accessed through Attack Ride: Connect.
 * - Decade's personal weapon as Kamen Ride: Gaim.
 * - Decade's personal weapon as Form Ride: Gaim Pine.
 * - Decade's personal weapon as Form Ride: Gaim Ichigo.
 * - Decade's personal weapon as Kamen Ride: Baron.
 * - Decade's personal weapon as Form Ride: Baron Mango.
 * and - Decade's personal weapons as Kamen Ride: Drive.
 * - Decade's personal weapon as Kamen Ride: Chaser.
 * - Decade's personal weapon as Kamen Ride: Ghost.
 * - Decade's personal weapon as Kamen Ride: Ex-Aid.
 * - Decade's personal weapon as Kamen Ride: Build.
 * s - Unique weapons transformed from past Kamen Riders through the Final Form Ride cards.
 * - Transformed from Kuuga via Final Form Ride: Kuuga Gouram or Final Form Ride: All Rider.
 * - Transformed from Kuuga Ultimate Form via Final Form Ride: Ultimate Kuuga Gouram or Final Form Ride: All Rider.
 * - Transformed from Agito via Final Form Ride: Agito Tornador or Final Form Ride: All Rider.
 * - Transformed from Ryuki via Final Form Ride: Ryuki Dragreder or Final Form Ride: All Rider.
 * - Transformed from Faiz via Final Form Ride: Faiz Blaster or Final Form Ride: All Rider.
 * - Transformed from Blade via Final Form Ride: Blade Blade or Final Form Ride: All Rider.
 * - Transformed from Hibiki via Final Form Ride: Hibiki Ongekiko or Final Form Ride: All Rider.
 * - Transformed from Kabuto via Final Form Ride: Zecter Kabuto or Final Form Ride: All Rider.
 * - Transformed from Den-O via Final Form Ride: Momotaros or Final Form Ride: All Rider.
 * - Transformed from Kiva via Final Form Ride: Kiva Arrow or Final Form Ride: All Rider.
 * - Temporary weapon loaned to Decade.
 * - Weapon give to him by.

Vehicles

 * - Decade's Rider Machine.
 * - Alternative machine form accessed through Attack Ride card as Kamen Ride: Faiz.
 * - Alternative machine form accessed through Decade Phone.
 * - Alternative machine form accessed through Decade Phone.
 * - Alternative machine form accessed through Decade Phone.
 * - A heavily armed combat motorcycle stolen from.
 * - A motorcycle given to him by.

Others

 * - A train ticket used by passengers of the time trains to get to their desired timelines. Adam had an infinity ticket used to allow passage on the.
 * - A special cellular-like device that all of the possess, functioning as their belt buckles and communicators. Adam had a magenta-colored Rainbow Pass allowing him to enter the . Given the fact the Rainbow Passes are the paper passes that  and the others all used as kids, it's unknown how Adam gained one.