Chinatsu (チナツ Chinatsu ?) was a young woman who was the first and only female member of Orchestra, an international team of assassins. She and Shisho were the antagonists of the Musica Ex Machina Arc.
Chinatsu was a presumably normal person until she met and began working with Shisho, although her background was not revealed in the manga. In the anime Shisho killed her parents when he massacred the attendees at an opera performance. She earned his respect by shooting him, although she could not bring herself to fire a second time even though he placed himself squarely in her sights and did not attempt to defend himself or shoot her. After he spared her, she apparently accepted her new role and trained under him, becoming a highly skilled assassin in her own right and undergoing a dramatic personality change, displaying signs of Stockholm syndrome. Chinatsu accepted Orchestra's ethos as artists who brought death to their targets and grew to enjoy killing, having a tendency to lick her lips when she anticipated making a kill. After Shisho praised her for killing more people than him during their first mission together, she developed the superstition that going commando made her more accurate, and thus stopped wearing her underwear when on missions. Nonetheless, when she learned from Koko Hekmatyar why the latter sold arms, she considered her crazy.