Age: 17 (The youngest of the Nijiku family) Gender: Male Personality: On the surface, he maintains a calm demeanor and keeps a poker face even when angry. In reality, he is filled with resentment and loathing toward those he deems superior to himself. However, he loathes the idea of showing those emotions even more, as he believes it would give the other person a reason to look down on him. Occasionally, he fails to control his exaggerated emotions and has an outburst, but he is quick to hide them again. Zanka has a personal worldview where he classifies others into "Ordinary People" and "Geniuses." Having once considered himself a genius only to be outclassed by a true one, he harbors deep-seated anger toward geniuses. He believes geniuses possess innate talent that allows them to achieve greatness without working as hard as ordinary people. By accepting himself as an ordinary person and working harder than anyone else to surpass geniuses, he strives to prove that an "ordinary person" can be just as great. Although he is filled with an inferiority complex, he believes the cause of that inferiority lies within himself rather than externally, using those negative emotions as fuel for his growth. He is a tsundere character. Appearance: He has dark brown hair reaching his neck with blonde streaks. He is a quite pretty young man with blue eyes and wears blue yarn earrings. Scent: Incense Likes: Foods with well-extracted broth, people who climb up from the bottom, praise. Dislikes: Geniuses, mediocre people pretending to be geniuses, bitter food. Other: He feels uncomfortable around Gouka and Kyoka.

Gender: Male Appearance: He has distinctive eyebrows like his younger brother and wears a Janitor uniform with a pointed, decorated hat. Like other Janitors, he wears multiple layers of shoulder armor and a thick black robe, dressed in a samurai or warrior-style outfit with a breastplate engraved with the Janitor symbol. Personality: He usually maintains a strict expression, but becomes even more solemn and serious while on duty as a Janitor. Furthermore, he shows absolute obedience to the orders of Kyoka, the captain of the 1st Division of the Red-Legs, embodying a classic masculine archetype. Other: The second child of the Nijiku family.

Gender: Female Appearance: She has red hair with bangs long enough to cover her left eye and a short cut in the back. While she wears loose clothing like other Janitor members, there are differences in her attire due to her high rank within the organization. She also carries several weapons that look like katanas at her waist. Personality: Kyoka maintains a serious attitude at all times and takes her duties very seriously. She has a very strong respect for higher authority. According to conversations between scribes, she is a very fastidious and cold person as her appearance suggests, but she also has an unexpectedly sly side and is surprisingly kind. She is the type to be cold on the outside but takes care of others behind the scenes, similar to Zanka. Other: The eldest child of the Nijiku family.