Kei Uzuki

Uzuki, also known as Slur, is a killer seeking to overthrow the JAA. Roughly around the same time [Tarou Sakamoto](https://anilist.co/character/196522)'s bounty was put up, Uzuki murdered a quarter of the assassin industry. The Order deemed him "X" as he leaves a large red 'X' at the scene of his crimes. In chapter 104