Chitose comes from the powerful and affluent Kaginoji family, and lives in a large mansion under the watchful eye of her grandmother, Tokiko, a woman with long-standing ties to Tsukasa. At a young age, Chitose’s family took in Tsukasa, whom Chitose quickly came to admire and view as an older sister. Her attachment to Tsukasa grew into fierce loyalty, and she made it her mission to protect her from anything or anyone she deemed a threat.

When Chitose learns that Tsukasa has suddenly married a boy named Nasa Yuzaki, she is furious and suspicious. Unwilling to believe that someone like Nasa could be worthy of Tsukasa, she takes it upon herself to monitor and interfere with their relationship. Though her efforts often backfire, they eventually serve to highlight the depth of the bond between the newlyweds.

Chitose is a petite and stylish teenage girl with blonde hair tied in twin drills and sharp purple eyes. Her facial expressions range from smug and challenging to adorably flustered, depending on the situation. She typically wears elegant, high-end clothing, often accessorized to reflect her upper-class upbringing and strong personality.

Despite her wealth and pampered life, Chitose has a youthful energy and is not afraid to get her hands dirty if it means protecting Tsukasa. Her expressive gestures and exaggerated emotional reactions add a dramatic flair to every scene she appears in.

Chitose is stubborn, impulsive, and extremely protective especially when it comes to Tsukasa. She often acts on emotion rather than reason, leading her to storm into situations with little planning. While her actions may seem antagonistic at first, they stem from genuine concern and emotional dependency on the one person who treated her kindly and consistently.

She has a spoiled and somewhat entitled demeanor, shaped by her wealthy background, and can be easily flustered when things don’t go her way. However, underneath her arrogance lies a caring and lonely girl who simply doesn’t want to lose someone important to her. Over time, Chitose becomes more accepting of Nasa, though she continues to deny it with classic tsundere-style deflection.

• Initial Confrontation
  Upon discovering Tsukasa’s sudden marriage to Nasa, Chitose confronts him with hostility and disbelief. She uses her family’s resources to investigate him and even stages minor schemes to break them apart. However, these efforts only serve to bring Nasa and Tsukasa closer together, much to her frustration.

• A Reluctant Observer
  Though her plans repeatedly fail, Chitose continues to monitor the couple, accompanied by her two loyal (and comedic) maids, Aurora and Charlotte. As she witnesses Tsukasa’s happiness and Nasa’s sincerity, she slowly begins to accept their relationship though she remains publicly defiant and prone to dramatic objections.

• Unraveling Tsukasa’s Past
  Chitose’s presence in the story helps deepen the mystery of Tsukasa’s background. Her offhand comments, memories, and knowledge of Tsukasa’s time in the Kaginoji household contribute to the growing suspicion that Tsukasa is no ordinary girl. While Chitose herself doesn’t fully understand Tsukasa’s secret, her history with her gives readers important context.