Chiaki Nagoya

As a newcomer to Maron and Miyako's classroom and the neighbor living next to Maron, this charming rogue hides a complex past involving running away from home. Operating under the secret identity of Kaitou Sinbad, he frequently clashes with Maron while secretly guarding her true identity. Though he initially acts like a flirtatious womanizer attempting to seduce her, his playful antagonism masks a deep devotion, eventually revealing a sincere desire to protect her for a lifetime.