Kirigaya Hitsugi is a girl who has the body of an elementary school student. She has a bad sense of direction, as demonstrated when she gets lost on her way to Myoujou Academy. Although Hitsugi looks like the horribly unreliable type, she also has her reasons for being in the Black Group. She is also quite attached to Chitaru, as she is a nice and caring person. In chapter 18, it is shown that she has a hidden gun within her stuffed teddy bear, proving that she is not just some small incompetent girl. It is also revealed that she is somehow affiliated with an organization that killed Chitaru's old teacher, whom the latter is trying to avenge. In Episode 6 of the anime, she stabs herself in Chitaru's hands by plunging herself to the knife Chitaru was holding against her. She survives the stabbing and is seen tending to Chitaru in the hospital during the end credits.
Catian Starship Crew. "Chaika" means "seagull" in Russian. An enlisted crewmember on the Catian mothership, Chaika is the most energetic of the Catian away team. Unlike almost every other Catian seen, she has an almost non-existant bust size, though she actually takes pride in this fact, saying, "The small ones can be fun too." As an enlisted crewmember, her bell doesn't allow her to change clothes instantly, a fact she complains about to the others. When Aoi and Manami want to train with cooking and firearms respectively, Chiaika shows them to the mothership's simulation room to allow them to do so without bothering the neighbors. Her favorite task is Embassy duty, since she can just lounge around and eat snacks all day.
A bandit who works alongside Julia, Frol, and Mart. He poses as a "Minister" in the group's "Neo Gaz Empire" cover.
A wizard who, like Chaika, carries a magic rifle. She is a companion of Red Chaika alongside David, and acts as the support of their group, much like Chaika does hers.
Konrad Steinmetz' personal assistant and member of the Kliemann Organization.
A General, and member of the Council of Six Nations. Commander of the Floating Fortress "Stratos", and of the punitive force sent to subjugate Duke Gavarni.