President of the Yin-Yang Council at Hyakkiyagyo Allied Academy. Since Hyakkiyagyo lacks an official student council, the Yin-Yang Council handles the practical administrative duties, making her equivalent to the academy's Student Council President (the political head). She is a schemer who is always squinting with a constant smile, possessing an elusive and slippery personality. It is often said that if you ask the Yin-Yang Council to resolve a situation, the requester somehow ends up doing the most work. According to Shizuko, even when complaints are filed regarding school issues, she responds with "Please submit important matters in writing," showing a very heavy-handed reluctance to deal with problems. This, combined with her overly composed attitude, makes others feel uneasy around her. Even members of her own club tend to treat her somewhat bluntly, perhaps because she appears to be constantly running away from work. However, her skills are worthy of someone entrusted with the politics of an academy. When the holding of the Cherry Blossom Festival was in jeopardy, even though she was absent, she showed her political prowess, information-gathering ability, and responsiveness by leaving a message with Chise, anticipating that Sensei and Shizuko would come to consult her. Her weapon is the handgun "Honeyed Words." The motif is likely the Type 14 Nambu pistol. She always carries it, but it is said that almost no one has seen her fire it.

A second-year student at Hyakkiyagyo Allied Academy and a member of the Yin-Yang Council. She exudes a mystical aura in her appearance and gestures, making her an object of envy and devotion to the point where students of Hyakkiyagyo address her with the honorific "-sama." She is an idol-like figure in the school with many fans, and events like "Princess Waraku," where she plays the lead role, are held. Because of this, her merchandise sometimes appears as event collection items in Hyakkiyagyo. However, she herself is unaware of the affection from those around her. She is a so-called "space cadet" with a fluffy, airheaded atmosphere. As noted in her hobbies, she often composes haiku. Among her combat-related lines are startling phrases like "Should I just... quickly clear away the obstacles?" or "Let's just burn it for now," leading some to wonder if she is more of a berserker than a mystic (in events, she has agreed with the Hot Springs Development Department's remarks about burning things). Perhaps because of this influence, one of the gifts she reacts strongly to for some reason is "Street of Delinquents Vol. 1." Her weapon is the "5-7-5 Type Grenade Launcher." The model is the MGL140. It is said that a haiku written by Chise is inscribed on each individual shell. In her swimsuit version, haikus related to summer are engraved.

Vice President of the Yin-Yang Council at Hyakkiyagyo Allied Academy and Strategic Leader of the Tourism, Culture, and Industry Public Relations Support Department. She serves as a close aide and assistant to Niya, the president of the Yin-Yang Council. She occupies the rare position of the "straight man" within the council and is even said to be more presidential than the president herself. She has a serious personality and seems to be constantly jerked around by the scheming Niya, sometimes showing a white-eyed shocked expression in the face of chaotic situations. She is a Hyakkiyagyo otaku with a deep love for its culture, which is the source of her passion for promoting Hyakkiyagyo's traditions. On the other hand, she secretly dotes on Chise (described as a "passionate fan" on the official Twitter) and finds her behavior adorable. Her weapon, "Strategic Leader's Know-how," is likely modeled after the Howa Type 64 rifle.