Ryusei Satou/Relationships

Keisuke Baji
Ryusei Satou is the Vice-Captain of the First Division of Toman which means that Baji trusts him enough to give him that position. Baji describes Ryusei as a person who skips meetings and ignores instructions, if it were up to him, he would kill Ryusei for overstepping his limit. However, Baji also admits that Ryusei is a very strong fighter and hence a very crucial part of the team and more importantly, Baji said, "I can't think of anyone else who could fill the position of Vice-Captain of the First Division other than that idiot."

Despite Ryusei being disobedient, he greatly respects Baji as his captain. Ryusei also cares for Baji as he protected him from a very big and strong gang, Killer Bee who tried to attack Baji in school since Baji cannot fight in school. Baji also sort of acts as a moral compass for him as when Ryusei lost control and almost killed the leader of Killer Bee, Baji stopped him. Baji also cares about Ryusei's well-being as he reminds him not to be so reckless. Ryusei gets beaten by Baji when he does something stupid in order to get some sense into him. He often annoys his Captain.

Chifuyu Matsuno
Ryusei thinks that Chifuyu is a cute guy. Despite the times Ryusei has insulted and fought with Chifuyu, he sees Chifuyu as a worthy member of the First Division of Toman. He even interceded for Chifuyu when the members of the First Division were upset with him. Though indirectly, Ryusei said that Chifuyu is very interesting, the opposite of him, an idiot.

Chifuyu sees Ryusei as an obstacle and rival for the position of the Vice-Captain of the First Division of Toman. Chifuyu also thinks that he is a very scary guy due to his fighting prowess and excellent deception skills. Ryusei greatly annoys Chifuyu because of his playful personality. Ryusei once pranked Chifuyu into getting a ridiculously large and hilarious pompadour and another time tricked Chifuyu into overeating noodles. Ryusei does not see Chifuyu as a threat and does not consider him a rival. Since it is Chifuyu's goal to defeat Ryusei in some way, the moment he gets to know that dogs are his weakness, Chifuyu doesn't hesitate to use it against him.

Chifuyu and Ryusei seem to compete about even the most trivial things, with Chifuyu taking the competitions seriously and Ryusei seeing them as a fun pass time. For example, they once competed for Peke J's affection.

Despite their rivalry, Ryusei once saved Chifuyu from getting beaten by a delinquent and Chifuyu acknowledged that Ryusei is not such a bad guy since Peke J likes him.

Cho
Cho is a member of the First Division of Toman. Ryusei greatly cares about him because when Cho was hospitalized after being brutally beaten up by a rival gang, Yagyō Dōji, Ryusei visited him every single day, leaving him gifts and flowers. Ryusei even took down Yagyō Dōji all by himself for the sake of Cho. Cho points out to Ryusei that he is actually a very kind and caring guy even though Ryusei tries to act like a selfish and self-centred person.