Ren Kaji

Kaji is an averaged-height well built, toned and strong yet slim, boy with platinum blond hair and dark gray eyes. He wears the Furin High School uniform with the green gakuran jacket layered over a gray hoodie, black jeans, and black low-cut sneakers for footwear. He wears a pair of headphones and often sucks on a lollipop.

Kaji is generally quiet and allows his vice-captains to speak in his place. He is easily annoyed especially after finishing a lollipop and reveals his true, quick to anger personality. Nevertheless, Kaji tries his best to be a dependable grade captain and acknowledges his weaknesses, readily relying on his vice-captains to support him.
when he was younger his anger issues were so bad that when he got mad he’d black out become some sort of animal as his friends described, attacking anyone and everyone even his friends till nobody was left standing. he hated it, and hated himself for it. until he met Hiragi who taught him when he needs to hold his tongue to pop a sucker in his mouth, and gave him headphones to use to refocus with music. he still has anger issues and is snappy and blunt, but he no longer becomes blindly violent unless someone offends his friends or team.

He dyed his hair blonde himself
Rumor has it, he was given his headphones, so he takes really good care of them
Although he likes to listen to music, he doesn't sing
Simple, blank phone case (bought from the 100yen shop*)
Prefers a coin purse
When thirsty, always goes for water
Always stocked with suckers
He seems to like plain hoodies
He apparently doesn't have that many clothes
He seems to really like being in rowdy places, but he doesn't get loud and excited himself.

Haruka Sakura: Kaji is initially annoyed with Sakura when he takes a long time to accept the position of grade captain, even deciding for Sakura after complaining about Sakura's hesitance. Kaji later acts as more of a mentor for Sakura when he reveals he was chosen as grade captain in a similar fashion as Sakura and encourages him to accept help from others.

Takeshi Enomoto: one of Ren’s two vice captains whom are very loyal and close to him. As a self-professed yakuza film lover, Enomoto is over the top in his speech and loud, rolling his ‘R’s way too often.
Yuto Kusumi: He serves as one of Ren Kaji's Vice Captains, along with Takeshi Enomoto. Kusumi is quiet. He is close with Kaji, often assisting him as his Vice Captain. He is helpful, but likely perceived as aloof due to his lack of words. He speaks with his actions.
Toma Hiragi: childhood friends, Toma is the one who helped Ren to find ways to control his rage. Toma tends to care for and look after Ren, being the one who gave him his headphones and takes over fights when ren gets too hurt or too angry and brings him food when he’s sick or injured. Hiragi seems upset or nervous and stressed most of the time. Indeed, the gang has been giving him stomach aches for three years now since it brings a lot of conflict, and he must therefore take care of telling Umemiya, the leader. Hiragi can't stand the delays or being attacked by the city that Fuurin protects; it annoys him more than anything. Although this character is often put forward, Hiragi can also be calm, even pedagogical. Apparently, he began suffering stomach pains since his first year in high school due to stress.