Yu Narukami has short, fluffy silver hair and gray eyes. He is generally quieter and more of the type to listen then talk, but cares deeply for his friends and is strong-willed. Has features of a tiger shark, like small fins on his arms and a long, grey striped patterned tail with shark-like fins and long ears. Not arrogant, just blunt and pretty blank-faced, but kind and empathetic. Has smooth placoid scales, extremely sharp if touched wrong way. Livesin cave with cousin Nanako and uncle Dojima