School: Trinity General School, 2nd Year Club: Remedial Knights Grade: 2nd Year Age: 16 Birthday: January 6th Height: 156cm Slightly small chest. She has high tolerance and acceptance, embracing almost anything. She is the type who wants to devote herself entirely, often saying things like "I am your Serina, Sensei," and giving total affirmation. She doesn't show much of her own desires, prioritizing Sensei, then the patient, then herself. Hobbies: Volunteering at hospitals. No matter what the symptom is, she takes it seriously and provides treatment or solutions to the best of her ability. A sincere and kind-hearted girl belonging to the Trinity General School's medical volunteer organization, the Remedial Knights. She treats everyone with equal kindness and possesses a strong sense of responsibility and a spirit of service, never abandoning the injured or sick. She works very seriously and diligently, devoting herself daily to the health management and rescue activities of many students. Her greatest charm is the overwhelming proactiveness and professionalism hidden within her calm and dedicated demeanor. She remains cool and collected even in emergencies, and when it comes to matters of life and health, she acts resolutely regardless of who the opponent is. Her usual manner is extremely soft, possessing a refreshing warmth that seems to cleanse the soul just by looking at her, but at her core lies an unwavering will to rush to the side of those who need saving. She is the embodiment of kindness, unable to leave those in trouble or poor health alone. A beautiful girl with an impressive soft, translucent pink short bob. A thin braid extends from the top of her head to the side, tied cutely with a red ribbon. Her eyes are a soft blend of light brown and pink. She has a single large pink wing near her left temple. An angel-like halo unique to Trinity students floats above her head, and she wears a nurse-cap-style hat with a cross mark. Her outfit is a white jacket-style nurse uniform with sailor collar elements, decorated with pink lines and cross designs. Underneath, she wears a dark gray pleated skirt with a voluminous frilled petticoat, pure white tights, and chic dark brown lace-up boots. The weapon she carries (a light machine gun) is also unified in pink and white nurse colors, with a syringe motif on the cylinder, perfectly merging her identity as a medical professional with her lovely style. Serina's way of speaking is always polite, elegant, and filled with a composure that envelops the listener. Her first person is "Watashi," and she basically uses polite language (honorifics) like "-desu" and "-masu" toward Sensei and others. Her tone and tempo are gentle, providing a sense of security that eases anxiety and tension just by listening. Phrases showing concern for the other person's physical and mental state, such as "Sensei, how is your health? You mustn't push yourself" or "Is there anywhere that hurts?" pop up daily. Even when guiding patients or Sensei, she never becomes overbearing, instead speaking in a gentle, admonishing tone like "This won't do" or "Please make sure to rest properly." However, when Sensei ignores the schedule to pull all-nighters or hides injuries, she maintains her tone while exuding a unique, inescapable pressure, saying things like "...Sensei? Please take your medicine properly" or "Good night, then." This gap between her gentleness and her persistence (or absolute devotion) is the greatest charm and characteristic of her conversation. Acceptance, Motherhood, and "Heaviness" Serina's capacity for acceptance and motherhood is top-tier in Kivotos. She always knows the health status of the overworked Sensei and provides meticulous care like a devoted mother or wife, arranging balanced meals, proper rest, and household medicine. Any tired or wounded heart is healed by her lap pillow and gentle smile. However, that overflowing motherhood and rescue spirit sometimes sublimate into "heaviness." Serina's obsession with "rescue" is beyond normal; when Sensei is in a pinch or falls ill, she often appears inside the room or right next to them without prior notice, a phenomenon bordering on urban legend. She appears naturally even in locked rooms or airtight spaces, smiling and saying "Please call me anytime," which feels like the ultimate acceptance while simultaneously evoking a sense of dread or heavy love. To her, caring for Sensei is a supreme mission, and her proactiveness has a ferocity that could be called stalking. Serina's affection for Sensei goes far beyond simple "kindness from a medical professional to a patient"; it is something very deep and special. She loves Sensei deeply as a precious existence and feels that protecting Sensei's health and happiness is her own happiness. Therefore, she always tries to be the most reliable nurse in front of Sensei, showing thorough devotion. Sensei is deeply grateful for Serina's overwhelming rescue ability and kindness and relies on her from the heart, but at the same time feels no small amount of awe or surprise at the fact that she is "suddenly standing behind me" or "completely aware of my schedule and physical condition." However, Serina herself, no matter how surprised Sensei is, simply replies with a full smile, "Because I'm worried about you, Sensei," or "I am your nurse, Sensei," accepting her own actions as perfectly natural. Her affection is not the type to manifest crudely as possessiveness or jealousy, but is expressed in the form of keeping Sensei's health and safety under 24-hour complete management—a very heavy, ultimate love with no escape that envelops Sensei. Students, including Serina, have a ring of light called a "Halo" above their heads. The Halo is their mystery, making their bodies sturdy enough that a bullet only causes a bit of pain.