Airu inuzuka is the older brother of Romio Inuzuka, the son of Shiba and Chiwa Inuzuka, and the current head of the Inuzuka House. Unlike his delinquent younger brother, Airu is very intelligent and diligent in most regards. As a result he is serious, strict, and often comes across as cold when leading the Black Doggy House. Despite this, he shows a softer side to children.