Ako is Hideki's in-game wife.
In real life, she's a petite girl with distinctly dark black hair and blue eyes. She's got kind of a messy look going on. At school, she pairs her uniform with a blue sweater and ties a red ribbon around her collar, completing the look with knee-high socks.
Her in-game appearance is basically the same, though her hair takes on a slight blue tint. There, she's dressed as a magical girl and carries a wand.
Content compiled by AnimeList.moe from publicly available sources.
