Ako is the main heroine, as well as Hideki's "wife" in-game.
In real life, Ako is a petite young girl. She has somewhat messy black hair, darker than normal black, and has blue eyes. At school, she wears her uniform with a blue sweater and wears a red ribbon around her shirt's collar. In addition, she wears knee high socks.
While in-game, she looks pretty much the same, except her hair is slightly bluish. She is dressed like a magical girl and wields a wand.