Kojima

Kojima (小島), also known as Koji, is a student at Sakura High School.

Appearance
Kojima is a confident looking boy in a standard college uniform. Her hair is short and blonde, but like most blonde characters in Tokyo Revengers, his true hair color is definitely black.

Personality
Kojima seems more of the show-off type, even in a situation that could end badly for him.

Fighting Prowess
Kojima's fighting skills have never been shown, but given his confidence, he has likely fought many times before. The odds of his fight against Takuya Yamamoto are 4-6 in his favour, which might suggest that he has already proven himself enough for punters to trust him.

Toman Arc
Kiyomasa's gang organized fights between different high school students and placed bets. That day, it was Kojima and Takuya who were supposed to face each other. But as Kiyomasa was about to start hostilities, Takemichi intervened and stopped the fight to fight Kiyomasa.