The youngest of the three half-sisters, Hina attends day care. She is the biological daughter of Yuri and thus the only one of the three girls who is directly related to Yuuta. She is very friendly and unafraid of strangers. She sometimes mispronounces words, often leaving out certain consonants. She normally addresses Yuuta as Oji-san (uncle) but has trouble with the "j" and "s" sounds so it comes out as Oi-tan (little uncle). She is a fan of the heroine anime, Luna Luna Seven.