Aoi "Tora" Torasaki

Aoi Torasaki is the childhood friend of Tooru. They knew each other from their martial arts school and he would usually hang around Tooru's house. Aoi's hair is short and cut a little like a bowl-cut. He wears glasses and is small for his age. He is also shown to be quite stubborn. (Source: Absolute Duo Wikia)