Tohma Seguchi

Tohma's relationship with his brother-in-law is a mix of intense affection and guilt over his own failure to protect him from the disaster when they were living in New York. He is over-protective of Eiri to the point where it becomes an obsession as he himself can't get over how he hired Yuki Kitazawa when he didn't know he was actually a pedophile that almost had Eiri raped until Eiri shot him as self defense, and there are several incidents that make it evident that between his business and Eiri, Eiri will always come first.