Renzo has natural black hair, which he dyed pink. In the anime he has typically been seen with a open white button-up layered over a t-shirt as part of his school uniform, as well as the True Cross Academy blazer. He seems to take his uniform a little more casually. In the manga however, he has been depicted with the True Cross Academy's dark sweater vest, a white long-sleeved collared shirt, and an undershirt.