anime
Yoichi Shigaraki
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Yoichi Shigaraki, was the younger twin brother of All For One, as well as the first user and progenitor of the One For All Quirk. He was presumed to be Quirkless, and could only watch as his brother committed atrocities. When his brother decided to forcefully implant a Quirk within him, it was discovered that he really did have a Quirk, one with no other power than that it could be transferred to others. The merging of the two Quirks resulted in the creation of "One For All". Due to being physically weak, he was unable to make effective use of his new power, but after being slain by his brother, the Quirk was transferred to another, leading down a path in hopes that one day it will grow strong enough to stop his brother. Despite his weak body, Yoichi was recognized for having a strong sense of justice, which came into direct conflict with the ambition and megalomania of his older brother. This feeling made him refuse to submit to All For One, despite his constant attempts to bring him to his side, dismissing Yoichi's beliefs as ridiculous idealism. Yoichi tried to stop his brother many times, though his efforts were always in vain. Even when he was physically weak and presumed to be powerless, Yoichi tried to resist All For One giving him a Quirk, not wanting a power that was stolen from someone else. Aside from his strained relationship with his brother, Yoichi is a friendly person and has a good relationship with all of his successors. He holds Izuku Midoriya in high regard, impressed by his conviction to help people in distress, even his enemies, and often voices his support for the younger hero. He also brought Kudo and Bruce to Izuku's side, despite them both initially refusing to acknowledge him, reminding them both on how they once sought to kill him for his connection to All For One, only to save Yoichi instead while calling them both his heroes.
Yoichi
