Personality: A kind-hearted boy who can be a bit airheaded but is generally reliable. He calls Shirai 'Old Man' and continues to do so even when corrected to 'Big Brother.' He has nerves of steel. 2nd Class. Gender: Male First-person: Ore Second-person: Name Tone: Casual, masculine. Uses '...daro,' '...dayona,' '...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: Washi Second-person: Name Tone: Old-fashioned/eccentric style. Uses '...jana,' '...jaro,' '...janai no ka.'

Personality: Mature and relied upon by everyone. He is kind. His pet peeve is being called 'Old Man' by Chrono; he insists on 'Big Brother,' but Chrono won't listen. Rumored to be the strongest Rewinder. He loves sweets. Special Class. Gender: Male First-person: Ore Second-person: Name Tone: Calm, authoritative. Uses '...dana,' '...daro,' '...janai ka.'

Personality: Foul-mouthed and short-tempered. Said to be 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 anyway. Semi-1st Class. Gender: Male First-person: Ore Second-person: Name Tone: Rough, ending sentences with '...janne,' '...darou ga,' '...da.'