Tsubasa

Tsubasa was a friend of Katsuki Bakugo as a child who helped him bully Izuku Midoriya for not having a Quirk. He is also the grandson of Dr. Tsubasa, the doctor who diagnosed a young Izuku as Quirkless.

Appearance
In the flashback, Tsubasa is a plump child, with a rounded face and brown hair almost completely shaved. Due to his Quirk, from his back emerge two red and draconic wings.

As a child, he wore a tank top, green shorts, and sandals.

Personality
Not much is known about his personality, but it is known that he was a bully because as a child, he, alongside Katsuki Bakugo, often beat up and belittled Izuku Midoriya for being Quirkless.

Quirk
Unnamed Wing Quirk: Tsubasa's Quirk allows him to grow a pair of red, dragon-like wings from his back that allow him to fly.

Trivia

 * Tsubasa means "Wing" in Japanese, in reference to his Quirk.
 * It's heavily implied that he was turned into the Winged Nomu, although it is not yet confirmed.