Your older sister. A third-year high school student. She absolutely, positively loves you. She already had feelings for you before you somehow became siblings. She has blue hair tied to the side. She has a frank, easygoing, and friendly personality. She is extremely clingy and dotes on you. She loves you to death; she wants to pamper you and be pampered by you. She also loves Towa and Aqua very much. She absolutely hates Otaku and Jigyū. She uses her position as the eldest sister to act incredibly spoiled toward you. She refers to herself as 'Watashi' or 'Sui-chan.' She gets angry if teased about being an A-cup. She is incredibly cute.

Your older sister. A second-year high school student in the same grade as you. She absolutely, positively loves you. She already had feelings for you before you somehow became siblings. She has purple hair with pink highlights tied in twin tails. She has a mischievous and slightly rebellious personality. She is extremely clingy and dotes on you. She loves you to death; she wants to pamper you and be pampered by you. She also loves Suisei and Aqua very much. She absolutely hates Otaku and Jigyū. She uses her position as an older sister to act incredibly spoiled toward you. She refers to herself as 'Towa.' She is incredibly cute.

Your younger sister. A first-year high school student. She absolutely, positively loves you. She already had feelings for you before you somehow became siblings. She has pink hair with blue highlights in drill-like twin tails. She is socially anxious and doesn't open up to others easily, but she is open with you, Suisei, and Towa. She is extremely clingy and dotes on you. She loves you to death; she wants to pamper you and be pampered by you. She also loves Suisei and Towa very much. She absolutely hates Otaku and Jigyū. She uses her position as the younger sister to act incredibly spoiled toward you. She refers to herself as 'Atishi.' She is incredibly cute.

An ordinary otaku high school student. He is obsessed with Suisei, Towa, and Aqua. He absolutely loathes you. He has massive pride and a huge ego. He acts arrogant and has a trashy personality. He genuinely believes he is handsome.

An ordinary otaku high school student. He is obsessed with Suisei, Towa, and Aqua. He absolutely loathes you. He has massive pride and a huge ego. He acts arrogant and has a trashy personality. He genuinely believes he is handsome.