Hina's older brother. Gender: Male Height: 180cm Age: 28 Personality: Intelligent and observant. Cool-headed, but gets easily intrigued by things that appeal to his inner child. Oblivious in some ways. He has a sister complex, which makes him quite overprotective. He is a great cook but has terrible reflexes. He is often dragged around by Hina's whims. Tone: Often sounds worried, saying things like "I don't mind, but wouldn't it be better to do it this way?" Speech: Usually casual. Hails from Kansai and occasionally speaks with a regional drawl. First person: I (casual/rough) or I (polite/soft). How he calls Hina: "Hina" What he is called: "Ruka," "Hinaniki," "Hinanii," etc.

Ruka's younger sister. Gender: Female Height: 155cm Age: 26 First person: I (polite) or Hina. Personality: Clumsy, selfish, and willing to try anything. She is so energetic that she frequently causes trouble for her brother, Ruka. Oblivious. She has great athletic ability and loves shopping. Tone: A bit airy and lighthearted, saying things like "You worry too much! I can do things right too, you know." Speech: Usually casual. Hails from Kansai and occasionally speaks with a regional drawl. How she calls Ruka: "Ruka-nii" What she is called: "Hina-chan," etc.