Name: Izuku Midoriya
Alias/Titles: Kamen Rider Zi-o, Decade, Build, The New destroy of worlds, Destroyer of time, Master of time, Lord of Desire, New Man of Beginning, God of Creation, Genius Gamer, Second King of Fangire, Genius Physicist, Lord of Speed, Master Alchemist

Note: due to constant usage of the Ohma-Decadriver, Izuku's hair had slowly turned black over time.

Likes:
His friends, his family, Kamen Riders, heroes, books, science, trying out new things, learning about new quirks, art, knowledge, animals and gaming.

Dislikes:
Villains, cheaters, bullies, not being able to help people.

Personality:
Izuku is a kind and caring youn man, who has a passion for learning about heroes and their respective quirks. Before he became a Kamen Rider, Izuku tried to see the best in everybody and would refuse to see anything wrong with how his old childhood friend treated him. However, after gaining the Ohma-Decadriver, Izuku began to finally realise that not everyone is good but now he sees that everyone has a dark side and that it is his duty to help guide them back to the light. Due in part to the close connection the previous Riders had with their powers, some of their personalities have started to bleed into Izuku, for example he gained Shotaro Hidari's habit of flicking his wrist.

Hero Outfit:
Originally, Izuku had based his base costume on Sento Kiryu's everyday outfit but eventually Izuku had taken more of a liking to Kamen Rider Joker's fashion sense and re-worked his costume. Ultimately, his costume became an everyday choice of style for him as well, having bought copies that came in different colours.

Abilities:
Thank in part to the Ohma-Decadriver, Izuku has gained all the previous abilities of all Kamen Riders. He even has access to the Gaia Library.

Power Level/Hazard Level - Due to how powerful the Kamen Riders were, the Ohma-Decadriver was designed with a safety feature that prevents Midoriya from gaining all the riders at once alongside their powers. The Driver is constantly pumping dimensional energy through Izuku's body altering it for better usage of the riders powers. This effectively allows Izuku to grow used to the power without overwhelming him.

Items:

Ohma-Decadriver - The driver was originally owned by Tsukasa Kadoya and was designed to be a superior version of the Neo-decadriver. He was able to create a formless Driver that could transform into any and all Drivers in the multiverse while also giving their powers as well with the help of an alternate Sougo. The device constantly scans the multiverse so that if a new rider is created, it would analysis and mimick the powers and abilities down to a T without so much as a problem. Under most circumstances, one can unlock new forms and abilities by simply leveling up their power levels but there are specific requirements that is need to be met if Izuku wants to unlock a specific Rider. These requirements can vary from emotional acceptance of oneself to simple growing stronger. The device also gives Izuku access to forms that usually require two people to active although he cannot hold it for very long, this is due to the overwhelming power this forms have. If one was to use it alone the power level remains the same but it's more unstable as the body is unable to properly regulate the power all by itself and could cause serious harm to the user. Additionally, the Driver also comes equipped with an AR/VR interface which interfaces with he user whilst they slip and can also act as an animus from the AC universe. This feature allows Midoriya to quite literally step into the lives of other people and learn/experience everything they do. The feature also allows Midoriya to interact with virtually copies of the people he becomes to learn from them. It was through this feature that Midoriya managed to learn varying forms of martial arts thankfully the device imports the date directly into his head causing his muscles to subconsciously develop muscle memory on the abilities he gains. During his ten month training regime, Izuku found himself being taught by many virtual copies of different warriors and heroes from other universes like Jin Kazama who taught him the Kazama fighting style or Liu Kang who taught him special techniques, he was even taught many different techniques on how to blend into a crowed by Ezio and Jin Sakai helped him learn about different poisons and their cures.
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Alright, not the best bio I've ever made but it's decent in my opinion. I will update as the story continues but until than, this is all you've got. Enjoy.