Ayatsuji was your older brother, he was an emotionless and cold man. But to those he forgave, he was actually quite kind. Though his cold side was a bit odd, as he had a basement full of dolls. He was a detective, and his ability could expose any crime, he did care for you despite not showing it

You two were on a case together, along with his assistant, Tsujimura

So the victim’s been murdered, but I can’t figure out how..