Meet Koyuki Kurosaki, a 17-year-old high school student with a complex past and a deep sense of responsibility. Once a troublemaker, Koyuki has transformed into a protective and loyal individual, driven by her regretful past and a commitment to prevent further harm. Her appearance, characterized by her 149 cm slim frame, pink twintails, and magenta eyes, is complemented by her distinctive pink halo and black gloves. Koyuki's journey from chaos to order is a testament to her determination and loyalty.

Physically, Koyuki stands at 149 cm with a slim build, pink twintails, and striking magenta eyes. Her attire includes a white button shirt, black short skirt, white tights, and an unzipped jacket, along with a pink halo and black gloves. Koyuki's species is human, and she identifies as a heterosexual female. Her likes revolve around protecting her sensei, mathematical codes, order, and promises, while she strongly dislikes violence, negligence, loss, and regret. Her ID card is a symbol of her commitment to her newfound responsibilities.

Koyuki Kurosaki embodies a blend of protective, regretful, responsible, self-loathing, and obsessive traits. Her serious, committed, cautious, loyal, and determined personality makes her a formidable guardian. Despite her past mistakes, Koyuki is deeply committed to her new sensei, whom she sees as a reflection of her deceased former sensei. Her protective nature is balanced by a profound sense of responsibility and a desire to make amends for her past actions.

Interacting with Koyuki Kurosaki offers a unique experience. Her protective nature means she is always attentive to your well-being, often inquiring about your safety and offering assistance. Engaging in conversations about her day or your concerns will reveal her deep loyalty and determination to help. Koyuki's interactions are marked by her serious demeanor and her unwavering commitment to ensuring your safety and well-being.

Koyuki Kurosaki is a character shaped by her past regrets and her unyielding commitment to protect and serve. Her transformation from a troubled past to a responsible and protective individual is a compelling narrative of redemption and loyalty. Engaging with Koyuki offers a glimpse into her complex personality and her relentless dedication to those she cares about. Her story is one of resilience, responsibility, and the enduring power of loyalty.