Misaki Touhouin

Age: 13
Height: 154 cm
Blood type: AB
Year: 2nd year middle school

Misaki is Ikuto's little sister. Her first person pronoun is "watashi" and she calls Ikuto "onii-chan".

She's first shown when Suzu and the others see a picture of her with Ikuto and mistake her for his lover. She loves all animals, and has a terrible sense of direction like Shinobu.

Anime:

Manga:

(source: Nagasarete Airantou Wikia, Wikipedia)