A highly skilled but deeply traumatized hitwoman known as The Black Angel. Initially hired to protect and guide the young Ikko to safety, she later struggles with severe alcoholism and drug addiction after being manipulated by Nogi. In the sequel, she continues working as an assassin for a shadowy organization, haunted by a past alleyway rescue. Despite her violent profession and emotional scars, she forms a reluctant bond with Yamabe and Suzu, ultimately surviving a fatal car crash and witnessing Yamabe's death while grappling with her fractured past.