Suguro Chayamachi said this quote

“ Keisuke: It's alright for you to kill someone?Akira: As long as they have tags. According to the rules, if there's three people present, it's an official battle. I'm not sure how you're supposed to start it, though.Keisuke: So killing people is just a game, huh?Akira: It's the only way to survive. ”