Tsubaki Hatsune, true name Rin Agane, is an assassin for the criminal group The Crimson Camellias. Orphaned after her parents died in a Karakuri attack, she met her first friend Len at the orphanage. Taken in after 2 years by the crime boss Miku, she was trained from a young age to be an assassin. She is sadistic, and from birth has had a desire to destroy, but specifically to destroy those who she believes are, as they are "worthless, brittle and fragile".