Oliver has knee-length white hair that is tied into a bottom ponytail with a black bow. He has two black horns, two ahoges, and a red circled "A+" mark on the right side of his hair. Additionally, his left arm is replaced with a pencil.

His outfit consists of a black collared shirt with white stripes on the sleeves and bottom, along with a rhombus with a slash in the center of his shirt. He wears white socks, black boots with white shorts, and black band on his right arm.