The long scar seems to have emerged from the inside of his veins. He also developed a long, pink/reddish scar twisting around his body from his left ankle up to his left cheek/under his eye (manga and anime), twisting messily around his whole body up to his neck (novel).

He was born with brown hair and brown eyes, but these changed to white hair and violet eyes (red in the manga and anime) due to the substance emitted from a parasitic wasp.

When Shion was twelve years old, he wore a white shirt with a light turquoise button up sweater vest over it, light brown trousers, dark brown shoes and her No.