Naoko has bottom curly brown hair and black eyes. She dresses in a plain yellow dress top with a white collar and a pink skirt. In episode 1, she wears a sailor suit, which was the uniform that Naoko wore to her old school.
Naoko is normally a bubbly, shy, and secretive girl, however, when she becomes angry she transforms into Gauko. While she transforms into a raging dinosaur, she also loves nature. Naoko has a crush on Toshio, who makes croquettes. she hates when Toshio talks like a loser