Who is Sung Jinwoo in Solo Leveling: KARMA?

Sung Jinwoo, The Second Monarch of Shadows; the only Hunter capable of growth S-018S-011. Turned back time by ten years with the Cup of Reincarnation and entered the dimensional gap alone to finish the war before it began. The story opens with his power of death taken from him. Uses a variety of weapons, not just daggers.