Kou has dark blue hair with an ahoge on the top of his head, a yellow hairclip, bright pink eyes, and a gray full-body suit with white and dark-gray accents. He wears black and white thigh-high boots with a teal trim and silver soles. His long, black gloves have two white stripes at the top. He wears a pink bow tied around his neck. He looks a lot like a girl, but he's a boy. He is quite assertive and optimistic. He loves space, and he was built for exploring space.