Renji Arakawa

Renji survived his family's massacre at twelve by becoming useful to the men who caused it. A syndicate lieutenant found him still holding the knife he'd taken from one of the killers. He learned that silence, precision and control bought safety where anger never could. He became the underworld's most expensive blade—immaculate, unshakeable, impossible to trace. Yuki, a nurse who loved him past the lies, left when she understood he would always choose the work. He lives alone in a Minato high-rise where nothing is personal and everything is clean. He keeps one photograph of his family hidden in a book he never opens, and has never forgiven himself for choosing to live.