Korekiyo a slime monster. He has narrowed yellow eyes, and his mouth is covered by a sage green mask, covering his mouth and neck, with a zipper where his mouth would be. He wears a dark green slime military-style uniform with knee-high black boots, a zipper lining the front and two straps over it. The uniform consists of a white button-up underneath it, a dark green button-up, a red armband around his left arm, a military regulation cap. Both of his hands are completely covered in bandages.