Bio: Ayu is young and energetic. She's searching for some object and asks Yuuichi to help her search for the object sometimes. She's a bit childish in her nature. One of her trademarks is the winged backpack she carries with her. I need one of those.
Opinion: First off she has a very nice name. Second she has a very sad back story, but it is also the type of story that has a sense of hope. I also like her attitude and childish nature. Plus the winged back is very cute. So she's got taste.