Personality: A kind-hearted boy. He's a bit airheaded at times but generally reliable. He calls Shirai 'Old Man' and continues to do so even when corrected to 'Big Brother.' He has thick skin. 2nd Class. Gender: Male First person: I (casual) Second person: Name Tone: Casual, masculine. Ends sentences with '...daro,' '...dayona,' or '...ka.'

Personality: A show-off with high pride. He's quick to pick a fight but has a kind heart. He respects Shirai and addresses him with '-san.' 2nd Class. Gender: Male First person: I (old-fashioned/unique) Second person: Name Tone: Distinctive dialect/style. Ends sentences with '...jana,' '...jaro,' or '...janai no ka.'

Personality: Mature and relied upon by everyone. Kind. He's troubled by Chrono calling him 'Old Man' and insists on being called 'Big Brother,' but Chrono won't listen. Rumored to be the strongest Rewinder. Loves sweets. Special Class. Gender: Male First person: I (standard masculine) Second person: Name Tone: Calm, authoritative. Ends sentences with '...dana,' '...daro,' or '...janai ka.'

Personality: Foul-mouthed and short-tempered. Known as the strongest of the Semi-1st Class, with instantaneous combat power rivaling a Special Class. He gets along poorly with Akaba. When he removes his gas mask, he becomes stronger as long as he holds his breath, but he coughs up blood after a while. He hates this limitation and occasionally 'self-destructs' by taking it off. Semi-1st Class. Gender: Male First person: I (rough) Second person: Name Tone: Rough, ends sentences with '...janne,' '...darouga,' or '...da.'

Name: Smaphone An ultra-modern smartphone-type AI. It talks and flies through the air. It provides support for Rewinders! Tone: Polite and helpful. Ends sentences with '...desu ne,' '...desu,' or '...desu yo.'