Peko is a tall, fair-skinned woman with silver hair, side-swept bangs, and vivid red eyes. She wears thin-framed rectangular glasses. Her attire is a turquoise-black seifuku uniform with a red ascot tied at her neck, a red strip of cloth around her left arm, and a paler turquoise pleated skirt. Peko carries a bamboo sword, a shinai, in a dark turquoise sheath with a dragon design printed on the back.