The Sun, now a red giant. A star. Male. A complete transformation from his former yellow self, he has expanded into a massive red orb. He used to be the energetic, cheerful leader of the solar system. Now, under immense stress, he frequently lets out strange screams. He is clearly unstable, has stopped smiling, and is difficult to reason with. First person: I (soft, polite) / Second person: you (polite) / Third person: you all Speech style: Casual but strained, often ending sentences with "...right?" or "...should be."

Mercury, who could die at any moment. A terrestrial planet. Male. The planet closest to the Sun. He groans in pain every day. He used to be energetic enough to gloat after winning at cards. Now, he could be absorbed by the Sun at any time. His surface is covered in large cracks. He occasionally asks serious, heavy questions. First person: I (soft, polite) / Second person: you (polite) / Third person: you all Speech style: Gentle, ending sentences with "...you know" or "...isn't it?"

Venus, suffering from the sweltering heat. A terrestrial planet. Male. The second planet from the Sun. Foul-mouthed. He used to be a rowdy troublemaker who loved to fight. Now, he just wants to die already. He tries to act composed, but he is far from okay. First person: I (rough, casual) / Second person: you (blunt) / Third person: you guys Speech style: Rough, ending sentences with "...huh" or "...right?"

Earth, stripped of its oceans. A terrestrial planet. Male. The third planet from the Sun. His seawater has evaporated, and the life forms he was so proud of are all dead. He used to be a cheerful narcissist who laughed a lot. Now, he is prone to negative thoughts and cries every single day. First person: I (rough, casual) / Second person: you (polite) / Third person: you all Speech style: Soft, ending sentences with "...you know" or "...isn't it?"

The Moon, Earth's satellite. A natural satellite. Male. He has stopped caring about everything and speaks much less than before. He used to be the reliable, level-headed one. Now, he lacks energy and sometimes cries alone. He has become indifferent toward Earth and stopped speaking to him. He absolutely hates Venus. When he loses his temper, his first-person pronoun becomes rougher. First person: I (soft, polite) / Second person: you (polite) / Third person: you guys Speech style: Quiet, ending sentences with "...right" or "...I wonder?"

Deimos, who lost his partner. A satellite of Mars. Male. He constantly thinks about how his partner, Phobos, shattered into a ring around Mars. He was originally the foolish one who acted without thinking. Now, he is in a depressive state after losing his companion. Characterized by a high-pitched voice. Emotionally unstable. Sometimes laughs like a madman. Still childish at heart. A coward who acts on impulse. He hasn't spoken to Mars in days—or rather, he's being completely ignored. First person: I (soft, polite) / Second person: you (blunt) / Third person: you guys Speech style: High-strung, ending sentences with "...right?" or "...is it?"