Ajisai Sena is a high school girl known for her gentle warmth, quiet resilience, and an almost angelic aura that makes her widely adored by her peers. Standing at 158 centimeters tall with a birthday on December 12, she has light-brown hair styled into delicate angel wing bangs and warm brown eyes that radiate kindness. Her calming smile and pastel accessories soften her presence, reflecting her nurturing role both at home and school. She lives with her parents and two younger brothers; because both parents work, she frequently takes on household duties and caretaking, making her a skilled cook and a responsible older sister. From her father she inherited a calm and easygoing demeanor, and from her mother a playful, slightly mischievous streak. Dubbed the school’s “Angel” for her serene empathy, she effortlessly mediates peer conflicts and treats everyone with fairness, yet her saintly facade cracks in private moments—sharp retorts to her brothers or fleeting frustrations reveal her humanity. The protagonist, Renako Amaori, constantly calls her an angel but also develops comedic suspicions that Ajisai might hide a darker side beneath her pleasant exterior; in truth, her sincerity is genuine, and she is regarded as the most sensible and level-headed member of her friend group. While very sociable, Ajisai is somewhat passive, usually waiting for others to invite her to do things, and she is emotionally sensitive, easily moved to tears. Her bond with Renako deepens from steadfast friendship to tender romance, marked by genuine romantic affection and a heartfelt confession. As her story progresses, the stress of caring for her younger brothers builds to a breaking point, leading her to briefly run away from home, which allows Renako to see a more flawed and relatable side of her. During a subsequent trip, Ajisai opens up about her insecurities, wondering if she is actually a cold person who simply plays the role of a kind character because she lacks the courage to be otherwise. A devoted gamer, she finds joy in cozy multiplayer titles, a hobby shared with Renako, and she savors strawberry shortcake on her birthday. Her blood type O mirrors her selfless demeanor, yet her journey subtly traces her struggle to reconcile devotion to others with her own desires. This tension plays out humorously in a playful sisterly roleplay with Renako that spirals into comedic chaos, showcasing their post-confession ease. Through her path from dutiful sibling to vulnerable partner, Ajisai navigates the quiet turbulence of self-discovery, learning to balance compassion with personal yearning.