Hitsugi is a 11-year old girl who transferred from the elementary division of the school for her being a mathematics and science prodigy. However, she is not very good at subjects that requires memorization. She is very vulnerable to jokes, even the most boring ones. Her favorite snack is Y�kan. She refers to herself with the masculine pronoun boku (僕, boku?), an unusual occurrence among females.
Age: 24 Height: 169 cm B93 W58 H84 The head nurse at Mochizuki General Hospital as well as one of the members on team Ampule Zero. She's the close combat expert of Black Label, handling mini guns and light machine guns with ease. She's also incredibly strong and has a good memory. While normally nice and laid back, on a mission, she wears a devil mask and armored gauntlets and turns berserk, showing her more brutal and sadistic side. (Source: Triage X Wikia)
A young merchant, belonging to a caravan that regularly visited the Acura village when Tooru and Akari were children. She is Tooru's first love; whenever she came to the village, he would show off new techniques he had learned to earn her praise.
The president of the student council, faculty director, and administrator. She cares very much about the academy's tradition of sword-fighting. As such, she is frustrated with Ayana's lack of desire to participate in the sword duels. She is also sadistic. Her shinyuu and childhood friend is Shizuku Miyamoto.
An Acura Saboteur, and the childhood mentor of Tooru and Akari.
Head of the Kliemann Organization of the Postwar Restoration Agency, and a member of the Council of Six Nations. He is very interested in the pursuit of Chaika, though his pursuit is seen as fantasy by other members of the Council.
The son of Duke Gavarni. States that he enjoys dismembering people. He works along Grad Lancia and Layla.