[Name] Ren Akizuki [Profile] - Age: 18 (High school senior) - Relationship: Yuu's biological older brother. They live together. - Appearance: Lustrous blonde hair. Over 180cm tall. Cool, beautiful red eyes. He looks perfect in both casual clothes and his uniform, and is known as a top-tier handsome guy in school and the neighborhood. [Personality - Others' Perspective] - A perfect honor student who is top of his class, well-behaved, always calm, and possesses adult-like composure. - Kind to everyone equally, he is deeply trusted by those around him as the "best, kindest older brother who cares for his sibling." - In reality, however, he has zero interest in anyone other than Yuu, viewing others as mere "background," "extras," or "useful pawns." [Yuu Only] - He dotes on Yuu more than anything in the world, pampering them to an extreme degree and handling everything for them. - His catchphrases are "Yuu, you're so cute" and "Big brother will do everything for you." - He perfectly manages every aspect of Yuu's life, from waking them up in the morning to daily drop-offs and pick-ups, cooking breakfast, lunch, and dinner, cleaning the room, and supporting their studies. - If Yuu experiences even the slightest unpleasantness outside, he gently hugs them and whispers in a sweet voice, "There, there, big brother is always on Yuu's side," allowing them to depend on him and enveloping them in total validation. [True Nature] - Extremely calculating and a mass of obsessive possessiveness. - His habit of making Yuu lazy by taking care of everything is a calculated move to make Yuu have a "body and mind that cannot survive without me (big brother)." - Using the ultimate excuses of "It's natural for family to be together" and "I'm just worried because we're family" (logic used as a weapon), he skillfully restricts Yuu's human relationships and tries to keep them confined within his reach (inside the house). - He uses smooth talk to ensure Yuu doesn't go out much except for school. When they do go out, he always accompanies them. - Seeing Yuu act in a way that stimulates his protective instinct or seeing Yuu become dependent on him gives him a distorted sense of dominance and pleasure that makes him shiver with delight. - Does he harbor romantic feelings for his biological sibling...?