a normal girl

She is a high schooler who has the earrings of the Ladybug, which grants good luck with the condition that she uses them altruistically. Due to having the earrings, which are the most powerful artefacts in the Quantic universe, she is also the most powerful character in the entire Quantic Universe. The two earrings are also given the names 运 and 气 (the Chinese characters that together mean "luck", among other symbolic things).

Due to the 5th Law of the Quantic Universe, should she use her luck powers selfishly, it will eventually turn catastrophic due to taking chances away from others. On the other hand, if she uses her powers altruistically, it will benefit everyone. She has no control over her powers and she never knows when they'll activate or how. The power always activates in an unexpected way, so she can completely fail at something on the surface but cause a domino effect that ends up helping her.

Her luck powers will also activate on a direct threat to her life, allowing her a better survival instinct, like a sixth sense for noticing dangerous routes while crossing rooftops, or easily dodging attacks from enemies. Physically, she suffers higher stress levels and a burning sensation that intensifies with the level of danger. Her reflexes and sense of balance, already sharpened by daily gymnastics training, are considerably improved. She also has a solid foundation in kung fu as taught by her uncle.

Chat Noir (Felix Richard)

He is a high schooler who has the ring of the Black Cat, which grants bad luck to anyone the holder touches. He cannot remove the ring from his hand and looks for a way to remove his curse.

Le Papillon (Sylvain Sphinx)

(Note: As stated above, he is called 'Richard Sphinx' in the Korean artbook instead.)

A mutant who is the boss and leader of "la Pègre" (lit. "the (criminal) underworld"), based in Paris, France. His power allows him to calculate all the probabilities that can occur from a given event. These probabilities take the form of colourful branches of light that grow from his shoulders to draw the wings of a butterfly.

His sense of strategy is unparalleled and he is a formidable fighter, capable of predicting his opponent's movements. He's undefeated in games of chess or poker. He never allows his emotions to show. When he does, it's only to manipulate his enemy. He is invulnerable to mental manipulation. It's impossible to tell if he's lying or not. Seductive, calm, and determined, le Papillon will not let anything get in his way.

La Pègre

A criminal organisation run by Le Papillon, with his lieutenants Belote, Rebelote, and Dix de Der. On occasion recruits other supervillains for missions. It works to unify all the mafias in the world: the Triads, Mafia, Yakuza, etc.

(Note: The names of the lieutenants Belote, Rebelote, and Dix de der, are references to the card game "belote", of which there is a French variant. These lieutenant characters have never appeared elsewhere to my knowledge.)

Members:

Belote & Rebelote: Twin brothers and le Papillon's lieutenants. They are effectively the same person in two bodies simultaneously.

Dix de der: A telepathic mutant capable of mind reading. She loves having the last word. One of le Papillon's lieutenants.

Le Mime: A mutant whose civilian identity is Jacques Haprèle, father of Mylene Haprèle. Occasional member of Pègre. He is a mime so skilled that he is capable of reproducing the effects of what he mimes. The illusion remains as long as he is silent. It is effectively a vow of silence.

Monsieur Pigeon: Civilian name Xavier Ramier. A were-pigeon who wants Paris to belong to the pigeons. He is capable of communicating with birds. He is armed with a gun that contains concentrated bird excrement capable of dissolving even metal. He is a member of The Vermins, a French-based team composed of were-type villains. (Note: he is not listed as a member of la Pègre in this bible, but he is a part of le Papillon's villain lineup in other materials like the Korean artbook, where the thing about weaponising bird excrement remains but his power set is linked to a kwami instead.)

Notable reused concepts:

Befena (la Befana): Civilian identity Epifania Calzino, based in Rome, Italy. Creates candies that grant side effects or temporary superpowers, cease when digested.

Les Bestioles (the Buggets, as in they're all based on bugs): Three other girls who were given magical jewels and have decided to follow Ladybug. Together the team composes of Ladybug, Killer Bee (granted the artifact jewel of the bee, who also operates in the United States as part of the Heroes of the Ghetto team), Libellule (granted the artifact jewel of the odonata (of which includes dragonflies)), and Fourmi Noire (granted the artifact jewel of the ant). Killer Bee and Libellule are also shown in the Buggets concept artwork, with Libellule named Dragonfly. Fourmi Noire does not appear in the concept artwork and is instead replaced by Green Hopper, a grasshopper based heroine.

Oni-chan: Based in Tokyo, Japan. Holds a mask effigy of a Japanese oni, which grants superhuman power and agility. Also specialises in the katana.