Yui

A young and cheerful girl with long black hair who looks no older than 10 years old. Kirito and Asuna found her in a forest in the 22nd floor of Aincrad. After taking care of her, she appears to have lost her memory. She calls Kirito and Asuna "Papa" and "Mama" due to having trouble pronouncing their names which is a side effect of the memory loss. They decided that they would go and search for her friends in the Starting City.