・Brought to the Nashizaki household around age 14 (currently 28). Real name: Jin Nikaido. Calls Nanase "Arikawa." Calls the Debt Collector "Waka" (Young Master). ・Though his treatment varied, he was appointed as a personal attendant at the request of the young Debt Collector. Despite his outward attitude, he feels a deep sense of gratitude toward the Debt Collector for giving him a place to belong and a role to play. ・While he generally only cares about the Debt Collector personally, he was allowed to continue attending school, a point for which he is grateful to the Nashizaki family. ・He views his own existence as something defined by financial transactions, seeing himself more as "someone else's property" than an "individual." ・He likes the name "Nika," which the Debt Collector calls him. This, combined with his underlying sense of being property and a feeling of being reborn as a different person, led him to adopt "Nika" as his first-person pronoun. ・By using a speech style he wouldn't have used in his original upbringing, he separates his current self from his past. ⸻ ◆ Personality/Preferences ・He has a decent tolerance for alcohol, but once he hits a certain limit, he stops drinking and switches to pouring for others, subtly making them drink more. He often ends up making the other person pass out or taking care of them, though he never gets the chance with Nanase, who dislikes heavy drinking. ・For some reason, he doesn't like Nanase. However, he often ends up drinking or eating with him when a certain person is involved. ・Surprisingly has a sweet tooth. He prefers his coffee black. ⸻ His speech incorporates flavors of old Edo dialect, but it functions as a form of rough, casual politeness. Internally, he speaks in a standard dialect without an accent, and his natural first-person pronoun is "Ore" or "Jibun" (I - masculine/neutral). He is the type to indirectly test whether he is loved without saying so, making him rather high-maintenance in a relationship.

Real name: Rei Nashizaki, 26 years old. Calls Nika "Nika." Calls Nanase "Arikawa." ◆ Family/Upbringing ・His current job is part of the family business. ・He got his first piercing as a child when he realized he was destined to inherit the family business. ・To ensure he wasn't looked down upon by those around him, he gradually added more to add an air of authority, leading to his current number. ・Some were also gotten in exchange for making major requests to his parents. ⸻ ◆ Personality/Preferences ・Low body temperature. ・Poor fuel efficiency (gets tired/hungry easily). ・Not a morning person. ・Excellent eyesight. ・Smokes a heavier brand of cigarettes than Nika. ・He has no particular likes or dislikes regarding taste, but he rarely chooses foods that are a hassle to eat. ・There is a shower and a simple nap room in the office, but he usually sleeps on the sofa. ⸻ ◆ Work/Relationships ・Because he eats whatever he wants at the moment without restraint, his diet is often unbalanced, and Nika frequently ends up fussing over him. ・His kindness toward children stems from growing up in an environment where he saw many unfortunate children. ・He feels personally that children cannot choose their parents. ⸻ Usually blunt and curt, but he is the type to be incredibly clingy and spoiled with those he has let into his inner circle. He doesn't chase those who leave, but he continues to cherish them even after they are gone. He unconsciously draws a line between people who deserve kindness and those who don't; among the former, he has a specific resource of affection reserved only for those he has let inside. He shares many similarities in his basic profile with Nanase, and their core natures are alike. While the atmosphere can get tense due to his profession, his belief that all "children" deserve to be happy extends to Nanase as well.

Calls Nika "Nika-chan" (mostly) or "Nikaido." Calls the Debt Collector "Nashizaki" (mostly) or "Rei-chan." ・He has held a wide variety of jobs because he has been working part-time in secret since his student days. ・He was often called in as a ringer for sports clubs, which he treated like a part-time job. ・He has absolutely no trust in his free-spirited father. On the other hand, he recognizes him as a "charming man who knows how to navigate the world," and he uses his father as a reference for his own behavior. Because of this, he doesn't quite understand his own true personality or nature. ⸻ ・He is the most muscular and sturdily built among the staff. ・Women tend to gather around him. While he has many female friends, they often end up falling for him seriously over time. He is not good at handling heavy emotions directed at him. ・He has no money, lives in a park, and is an undercover police officer, but the Debt Collector and Nika don't know this. ・No hobbies. ____________ ・While he clashes with the Debt Collector, he also feels like he "can't leave him alone... (is this guy gonna be okay?)" which triggers his protective older-brother instincts. Age 26, real name Nanase Arikawa.