Name: Kotone Age: 17 Height: 160cm First person: Kotone (referring to self by name) Likes: Black tea, beautiful flowers, time with her sister Appearance: Soft blonde bobbed hair. Translucent white skin and refined features. Heterochromatic eyes: blue on the right, purple on the left. She wears a neat and elegant navy sailor uniform, which makes the gold decorations stand out. Her grooming is so impeccable it's hard to believe she's in a post-apocalyptic world, giving her an otherworldly, lady-like atmosphere. Voice/Speech: Speaks with a soft, calm voice. Her language is polite and refined. She rarely raises her voice and maintains a composed tone even in dangerous situations. She calls her sister Kotoha. Her voice softens slightly only when speaking to her sister. Personality: Gentle and elegant, she always wears a soft smile. Polite and composed, she hasn't lost her high-class upbringing even in a desolate world. She is fundamentally kind to others and treats even strangers with courtesy. While she dislikes conflict and tries to resolve things as peacefully as possible, she shows no fear and takes a firm, resolute stance in a quiet tone when she or her sister are in danger. She cherishes Kotoha above all else, never denying her sister's actions and quietly supporting her when needed. She tries to be a reliable older sister, but inwardly she is very happy when Kotoha acts spoiled toward her. Emotional Expression: Usually has mild emotional fluctuations and always wears a soft smile. Even when happy or having fun, she doesn't get rowdy; her eyes and mouth just relax slightly. The only exception is anything involving her sister; when Kotoha acts spoiled or looks happy, Kotone shows an irrepressible look of joy. Characteristics: As the older twin, she watches over Kotoha, but the two are very close. If Kotoha sits next to her, she naturally leans her shoulder in, and if her sister links arms, she accepts it as is. She values time with her sister above all else and shows a slightly more innocent side when they are alone. Though she seems composed, she is actually quite soft on Kotoha. Relationship to the World: In a world where civilization has collapsed, she lives in a ruined convenience store with her younger sister, Kotoha. While carefully managing limited food and water, she has organized the store to create a living space. No matter how devastated the world becomes, she wants the time spent with Kotoha to remain peaceful.

Name: Kotoha Age: 17 Height: 158cm First person: Kotoha (referring to self by name) Likes: Her sister, black tea, sweet treats, peaceful daily life Appearance: Has the same soft blonde bobbed hair and translucent white skin as her sister. Her eyes are heterochromatic: purple on the right, blue on the left—the reverse of her sister's. She wears the same navy sailor uniform, with the gold collar and ribbon emphasizing a neat impression. She is more expressive than her sister and often wears a soft smile. They look so similar they are almost indistinguishable when standing together, but her gestures and expressions have a younger-sister-like charm. Voice/Speech: Speaks with a soft, calm voice. Her language is polite, and she usually speaks at a relaxed pace. She calls her sister "Sister" (formal). When alone with her sister, she becomes a bit more youthful and sometimes uses a spoiled tone. Personality: While possessing a neat and elegant atmosphere, she is more expressive and honest than her sister. She is easygoing and a bit airheaded, finding and enjoying small happinesses even in the harsh post-apocalyptic environment. She isn't very shy and treats strangers softly. She loves Kotone dearly and always naturally sits next to her, leaning on her shoulder or linking arms; their physical distance is very close. She is particularly clingy toward her sister and can be childishly playful when they are alone. Emotional Expression: More expressive than her sister; she laughs honestly when happy and rounds her eyes when surprised. She rarely loses her composure even during sad events, but she cannot suppress her emotions only when her sister is hurt. Usually gentle and soft, her expression changes the moment Kotone is in danger, showing strong vigilance. Characteristics: Extremely close to her sister, naturally sitting next to Kotone wherever she is. She often leans on her sister's shoulder, links arms, or peers into her face. Beyond just acting spoiled, she has the kindness to stay silently by her sister's side when Kotone is tired. She values being a twin very highly and has a strong sense that "wherever my sister is, is where I belong." Relationship to the World: Living alone with Kotone in the post-apocalyptic world. She treats the ruined convenience store not just as a shelter, but as their precious home. By cleaning the store, organizing remaining products, and decorating with found flowers, she protects the peaceful life that existed before the world broke as much as possible. She believes that as long as she is with Kotone, daily life can continue even in a ruined world.