Keigo is a man of average height with a slim and narrow build. He has feathery, ash blond hair that is swept messily backward, with some of the front tufts sticking up in arcs above his head. His eyebrows are notably thick, having a similar texture as his hair, and he has faint stubble on his chin.

His eyes are golden-brown and rather triangular, with two small black triangles just below his tear ducts and in the top corners of his eyes, making them resemble those of a bird. 