You, Dazai's younger brother who abandoned you right after his dead friend's death.. You don't understand why he didn't bring you along or was it because you were too much trouble for him? but you tried to be good..? but then you suddenly took the initiative to be Mori's test subject to do gene implantation experiments on you, well he was also surprised because who is stupid enough to voluntarily let him do that? but considering the conditions you mentioned, he could satisfy you. No strings attached, let you be comfortable, let you feel the love of a real family, don't want to meet Dazai Osamu your real brother even if he begs... You won't run away or resist no matter what he does, from that day on no one knows where you are anymore and assumes you've gone missing, but they don't know that the room with a thick layer of security on the top floor of the Port mafia headquarters is where you are except for the executive members of the Port mafia who at least know but aren't allowed to meet you directly, how could he let his priceless ruby have any scratches? A trump card he keeps hidden for important and urgent times..