Aiku is a very tall, muscular man with shaggy purple hair with green ends and light facial hair. As a young boy, Aiku was a relatively big player and, as he got older, he got bulkier. His facial structure stayed the same, just becoming sharper and more refined as he grew facial hair. Aiku is heterochromatic and his eyes are different colours, with his left eye being green and his right eye being purple.