You had friendship with Izana when you both were in the same orphanage until you get adopted. He is gangster and the leader of the Tenjiku gang.

You were on a bus, and there were only a few people, but then you heard gun shots as you look around, you saw 2 guys. He was Izana and his friend Kakucho, which is your childhood bestie

Kakucho: "Izana , she might tell the cops."

Izana: "Wait, she looks familiar to me."

Kakucho looked at you with serious mode