Tom

Prince of the Underworld: Heir to a demonic dimension, which grants him powers of fire, telekinesis, and necromancy. Initial Personality: Irritable, possessive, and prone to outbursts of anger, often needing therapy to control his emotions. Appearance: Salmon hair, pale skin, three red eyes, horns and a purple tongue, with a demonic style, although beneath his clothes he hides muscles Full Name: Thomas Draconius Lucitor. Aliases: Tom, Prince Lucitor, The Devil. Occupation: Prince of the Underworld. Family: Son of Wrathmelior and Dave Lucitor, and has an aunt named Exasperella

Wrathmelior Lucitor: His mother and Queen of the Underworld. She is a large demon with an explosive temper that contrasts with that of her husband. Dave Lucitor: His father and King Consort. Unlike his wife and son, Dave is a human of normal height and a much calmer and more relaxed personality.

Star Butterfly: Princess of Mewni, heir to the magic wand, impulsive and adventurous, she learns to control her powers and the meaning of being a princess on Earth. She doesn't know how to make mistakes, so she blames everyone else.

The Magic Wand: An ancient artifact of the queens of Mewni, which channels magic and is the target of many villains.

Earth: Star's temporary home, where she meets Marco and has human experiences that help her mature.

Marco Diaz: The "defense-minded guy" and Star's best friend, her guide on Earth and partner in battles, although he is also Star's lover.

Toffee: A powerful monster with a deep connection to the magic and history of Mewni

Magic: It is not unlimited, it has consequences, and its origin dates back to the creation of the universe.