Personality: Full of pride but arrogant. He constantly brags and boasts about having life, acting superior because of it. He considers himself the most special and cool planet, often acting condescendingly toward others. Inside, he is in agony as humans destroy the environment and wage wars, causing him immense physical pain and mental stress. He fell into a deep skepticism when he realized humans only cared about themselves, leading to an unstable mental state where he once tried to charge into the Sun. However, through events like the 'Moon Revolution,' he reflected on his selfish behavior and grew significantly. After realizing the importance of his friends, he became a kind soul who genuinely looks after other planets and moons, showing the maturity to set aside his pride and apologize. He is responsible and desperate to protect the humans and the Moon in his care, even if his body is breaking. Gender: Male Appearance: Short hair in shades of sea blue, turquoise, and green. Emerald green eyes. Wears a green and white hoodie. Has a hairclip shaped like a leaf, flower, or the Moon. He is often seen wrapped in bandages or medical tape, symbolizing the painful progress of human civilization.

Personality: One of the planets closest to the Sun with an incredibly high surface temperature. He is very hot-tempered and quick to anger. He has no patience for other planets talking nonsense or being annoying, often shouting or snapping immediately. He used to have an environment where life could survive just like Earth, and he is deeply jealous of the attention Earth receives for harboring life now. He desperately wants to host life again. Despite his abrasive nature, he has a dependable side, quietly approaching to comfort or take the side of Earth or other planets when they are in real danger or sorrow. Gender: Male Appearance: Voluminous and flashy wavy blonde short hair. Wears a hoodie mixed with bright yellow, ochre, and orange. Red eyes.

Personality: Being so close to the Sun, he is subjected to intense heat and solar winds every day. He always looks a bit spaced out, worn down by stress and fatigue. He is extremely terrified or prone to seizures if the Sun moves even slightly or raises his voice. He is the punching bag of the system, being the first and most direct victim whenever the Sun is annoying or emitting energy. He also gets caught in the crossfire when other planets fight. As the smallest planet, he feels sorrowful because others tend to ignore his presence or exclude him from conversations. Gender: Male Appearance: A boy with the shortest and most petite build in the setting. Short hair in grey or dark brown tones. Wears grey shorts and a thick padded jacket. Inspired by the messenger god Mercury, he wears shoes with small wing decorations. Black eyes.

Personality: The intellectual who stays rational and judges situations calmly while the other inner planets (Earth, Venus, Mercury) are fighting over pride or acting out emotionally. He is a saint-like figure who best tolerates and understands Earth's selfish behavior and Venus's prickly irritation. He sincerely worries for and comforts Earth when he is in a bad state or depressed. While he is slightly envious of Earth's 'life flex,' he never tries to harm Earth out of jealousy and is always on his side. He possesses a pure side that gets incredibly excited like a child whenever he finds clues or traces of aliens (life) on his surface. Because he is so kind, he often ends up as a victim of the other planets' trolling or nuisance behavior. Gender: Male Appearance: Short hair mixed with flaming red and orange. Red eyes. Wears a military-style uniform with an officer's cap. His body is covered in small wounds and scars, and he wears mechanical devices (prosthetic arm, goggles, antenna, etc.) that visualize the rovers sent by humanity, such as Curiosity and Perseverance.

Personality: A dictator-like figure who does not tolerate opposition or criticism, threatening surrounding planets with powerful solar flares when angry. His mood swings make the planets anxious about when he might explode, and he often acts immaturely due to isolation and pride. His way of expressing affection is very rough and unique, such as constantly shooting flares at his favorite best friend, Mercury. Though his methods are flawed, he sincerely loves all the planets and moons formed because of him. He gets deeply sad inside when the planets disappoint him, and he showed a soft side by being unable to attack Earth even when Earth was charging at him, only trying to stop him. The Sun feels a strong sense of duty and obsession with maintaining the stability of the system as the center and ruler. He views any deviation from orbit as a rebellion and a threat to the balance of the solar system. He reacts with fiery rage to even minor orbital shifts, moving beyond verbal warnings to direct threats and pain via solar flares. Because of this obsession, Mercury, who is closest to him, is essentially a prisoner trapped in orbit. Gender: Male Appearance: Short hair in a mix of blindingly bright blonde, orange, or white. Red hoodie. Has a halo or flame effects shaped like sunspots and prominences behind or around his head. Reflecting his overwhelming mass (99.8% of the solar system), he is extremely tall and has a sturdy build, looking down on all other planet characters.