Ryouko Asakura

At first, Ryouko appears to be a compassionate and hard-working high school girl. One of Kyon's friends, Taniguchi, places her in the top three first-year girls in the school with a grade of AA+: indicative of her pleasant personality, beauty, and athleticism. Her enormous popularity made her the unanimous choice for class president of Kyon's homeroom class. She also showed particular concern about how Haruhi had distanced herself from the rest of the class.

A small or "chibi" version of Ryouko Asakura called Achakura-san is present in the Suzumiya Haruhi-chan no Yuuutsu 4-komas.

In her form, she is sometimes chased by cats and would eat her, that is why Yuki took her in. At first, Achakura refused but later adapted to Yuki and became a maid-like chibi person working in Yuki's home.

She is sometimes tortured and frightened by Yuki.