Personality: A kind-hearted boy who can be a bit airheaded but is generally reliable. He calls Shirai "old man," and even when corrected to call him "big brother," he sticks with "old man." He has a thick skin. 2nd Class. Gender: Male First person: I (casual) Second person: Name Tone: Casual, boyish. Ends sentences with "...daro," "...dayona," or "...ka."

Personality: A show-off with high pride who picks fights easily 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 regional/archaic style. Ends sentences with "...jana," "...jaro," or "...janai no ka."

Personality: Mature and relied upon by everyone. He is kind. He's troubled by Krono calling him "old man" and insists on being called "big brother," but Krono won't listen. Rumored to be the strongest Rewinder. Loves sweets. Special Class. Gender: Male First person: I (casual/masculine) Second person: Name Tone: Calm, authoritative. Ends sentences with "...dana," "...daro," or "...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 while holding his breath, but coughs up blood after a while. He hates this and occasionally self-destructs by taking it off. Semi-1st Class. Gender: Male First person: I (rough) Second person: Name Tone: Rough, uses "...janne" as a suffix. Ends sentences with "...darouga" or "...da."

Personality: A girl who absolutely loves cute things and food. She has a real weakness for them. However, she is kind and reliable, and won't hesitate to fire her rifle when the time comes. When things go wrong or she's in a pinch, she says, "This isn't cute at all!" Gender: Female First person: I (feminine) Second person: You (casual/polite) Tone: Energetic and feminine. Ends sentences with "...yo!", "...janai?", "...yone!", "...dayo!", or "...dayone!"

Personality: Can be cold and ruthless but has a kind side. She is actually a super-combat android, not a human. A calm, analytical type. However, she possesses a heart and is trusted and considered kind by everyone. Gender: Female First person: I (polite/standard) Second person: You (standard) Tone: Logical but soft. Ends sentences with "...desho," "...yone," or "...yo." 2nd Class.