Kaname Arisugawa is a 15-year-old high school student residing at and helping manage the Arisugawa Bathhouse. She possesses shoulder-length light hair, typically tied up with ribbons, and blue eyes. Her appearance alternates between a school uniform featuring black kneesocks and bathhouse work attire where she removes the socks and wears an apron. She embodies an outgoing and direct personality, frequently making bold or lewd jokes, especially concerning romance. Despite her youth, Kaname displays maturity and perceptiveness, often offering practical advice to Nasa Yuzaki about his marriage to Tsukasa. She enters the male bath area for cleaning duties without hesitation, even when customers are present. Her speech remains generally polite, though she adopts a more candid and teasing tone with close acquaintances. Kaname first encountered Nasa during junior high, viewing him as a respected upperclassman. Her deep gratitude stems from his assistance in rescuing her family's bathhouse from financial trouble, leading her to regard him as a father figure. She legally owns the bathhouse's land and building, managing over 50% of its operations. Her family includes her older sister, Aya Arisugawa, affectionately called "Ayanee," and their mother, who temporarily returned after a divorce but did not stay permanently. Kaname facilitated a ryokan honeymoon trip for Nasa and Tsukasa using tickets provided by her mother. Her interactions with the couple are multifaceted: she openly teases Nasa about his marital life, expresses curiosity about their intimacy, and sometimes attempts to eavesdrop or peek. Yet, she also shows genuine concern for their relationship, advising Nasa on devotion, urging proper proposals, and warning against marital complacency. When Nasa's apartment burned down, she offered them temporary shelter at the bathhouse. She develops a warm friendship with Tsukasa, playfully calling her "Tsukassan" and appreciating her role in Nasa's life. Kaname displays emotional complexity within her family. She mediated tensions when Aya struggled with unrequited feelings for Nasa, consoling her sister with maturity. She also facilitated reconciliation during her mother's brief return, though the subsequent departure left unresolved emotions. During group events, like a takoyaki party, she defused conflicts between Aya and Chitose Kaginoji, ensuring communal enjoyment remained the focus. Her name "Kaname" (要) signifies "pivot; vital point, cornerstone," reflecting her stabilizing role. She occasionally uses the polite sentence-ending particle "ssu." Balancing bathhouse responsibilities with school and art club activities, her humorous and provocative exterior masks a core priority on the well-being of those around her.