Hitoshiki Zerozaki

The No Longer Human serial killer of Kyoto and member of the Zerozaki clan: Hitoshiki Zerozaki. Notoriously known as the Prowler during the Kyoto serial murder case. Hitoshiki is a man with a small stature that kills for the sake of killing. Soushiki Zerozaki and Hitoshiki have a somewhat brotherly relationship, though they've grown distant. In general, he doesn't have many friends as a serial killer, though Iori Mutou could be considered one, as well as Ii. Another killer, Izumu Niounomiya, is a friend and rival of Hitoshiki.

Hitoshiki himself is eccentric, though he generally has a casual personality and way of speaking. He considers himself a brat and believes everyone else was once a brat. When he and Ii meet, he calls Ii a doppelganger as they are essentially identical, yet so different. Hitoshiki is later described as the mirror image of Ii, and what Ii would be like if he didn't…