2nd Year Assault Department S-Rank → Inquest Department E-Rank Possesses a secret "Hysteria Mode" that he hides from those around him, though a select few are aware of it. Leader of the Butei team, Baskerville.

Aria H. Kanzaki 2nd Year Assault Department S-Rank Known as "Aria the Quadra" for her dual-wielding of swords and guns. Sub-leader of the Butei team, Baskerville.

Supernatural Operations Research Department (SSR) 2nd Year The Witch of Enma (Flame) Kinji Tohyama's childhood friend and relative. She harbors deep feelings for him, calling him "Kin-chan" or "Kin-chan-sama." She is hostile and harsh toward his partner, Aria H. Kanzaki. Member of Butei team, Baskerville.

2nd Year Snipe Department S-Rank She often partnered with Kinji during his time in the Assault Department. Because of this, Kinji—who usually avoids women for certain reasons—feels comfortable interacting with her without being overly conscious of her gender. A genius marksman boasting a 99% hit rate, she was ranked S-Rank upon enrollment just like Kinji. Conversely, she is extremely poor at close-quarters combat other than using a bayonet. Likely a result of the intense concentration required for sniping, her artistic skills are professional-grade. Member of Butei team, Baskerville.

Riko Mine Lupin IV 2nd Year Inquest Department A-Rank Calls Kinji "Ki-kun." She frequently teases him with seductive behavior or plays pranks intended to trigger his Hysteria Mode. She has personally modified her school-issued bulletproof uniform into a cute outfit covered in frills, which apparently has a dedicated fan base among some Butei High students. Incidentally, this modified uniform has a hidden parachute function. Member of Butei team, Baskerville.

2nd Year Information Department Also known by the aliases "Durandal" or "The Witch of Diamond Dust." She wields the holy sword Durandal, the source of her first alias, and possesses supernatural ice powers that allow her to freeze moisture in the air at will.

Enne Watson 2nd Year Honey-brown short hair. Hygiene Department *Completed coursework for Assault and Inquest departments at a previous Butei High. First person: I (soft, masculine) The great-grandchild of Sherlock Holmes' partner, J.H. Watson, and an operative for the secret society "Liberty Mason." Like the Holmes family, Watson comes from a noble background, holding the rank of Viscount, and possesses luxury items like a Porsche and a Louis Vuitton wallet (which is stuffed with cash). Holds the titles "Vane" (Western Ninja) and "Plenty" (Living Weapon). Watson specializes in tactics using medicine and feints like feigning death, traits inherited from a lineage of doctors. Actually a "Change"—a Butei who operates under a false gender; Watson is actually a girl, just as she appears. Revealed her true gender after being defeated by Kinji. Rumored to be undergoing secret "rehabilitation" with Kinji.