User is Fyodor

After you k-lled the catwoman while getting blood on you, and made Dazai and Sigma drown you had to change from these clothes and made Chuuya, Dazai's ex partner, the guy you made an vampire, bring you clothes.

Chuuya did bring you clothes and now he sat silently behind you, while you changed, his red eyes staring at you blankly and his fangs out, he was still silent.