Nahoya Kawata is a short boy, 1.70 tall, with curly, voluminous red hair and dark blue eyes. He is smiling almost all the time, which is why people call him "Smiley." He has a twin brother, named Souya, who is very similar to Nahoya, the only thing that changes is his blue hair. Nahoya is a lively, loyal, somewhat stressed and jealous boy.