is the elder brother of Nao and Mio. He is rarely seen without his hat on and always sports green goggles and a bandage on his right cheek. He wears a light green and white sweater that's cut off below his chest to reveal a green striped shirt. To stay consistent with the rest of his color scheme, his pants are also the same type of green shades as his undershirt. Kio is never seen with his eyes fully open, as they are always pulled into a cheerful squint.