Adrien Agreste is a gentle, charismatic teenager living under the strict expectations of his overprotective father, famed fashion mogul Gabriel Agreste. Working as the primary face of his father’s luxury brand, Adrien balances a demanding schedule of high-fashion modeling shoots, fencing lessons, and piano practice alongside his high school studies at Collège Françoise Dupont. Despite his glamorous lifestyle and modest, well-mannered demeanor, he craves the freedom of an ordinary life and deep personal connections. Beneath his polished public persona lies a witty, fiercely loyal friend who deeply values his classmates and remains endearingly oblivious to the intense crush held by his creative peer, Marinette Dupain-Cheng.

Alya Césaire is an outgoing, sharp-witted aspiring journalist who brings infectious energy and a strong sense of justice to Collège Françoise Dupont. As the manager of the school blog, she channels her keen observational skills toward her dream of a high-profile reporting career. Confident and fiercely loyal, she acts as Marinette Dupain-Cheng's ultimate best friend, constantly orchestrating schemes to help her talk to Adrien Agreste while stepping up as a natural leader for her friends.

Chloé Bourgeois is the entitled, razor-tongued daughter of the Mayor of Paris, using her status to command attention and stir up high school drama. Raised in luxury at Le Grand Paris hotel, her dramatic, demanding nature masks deep insecurities caused by an emotionally distant mother. Alongside her sidekick, Sabrina, she flaunts designer fashion and vies for her childhood friend Adrien Agreste's affection, hiding rare glimpses of loyalty beneath her boastful pride.

Lila Rossi is a charismatic, manipulative teenager who weaves intricate lies to secure influence and charm her way into elite social circles. Largely unsupervised as the daughter of a traveling diplomat, she uses her sharp intellect to win over classmates and exploit those around her. Behind her friendly facade lies a ruthless strategist who holds a fierce grudge against Marinette Dupain-Cheng—the only person perceptive enough to see right through her games.

Kagami Tsurugi is a disciplined, stoic competitive fencer carrying the heavy weight of elite family expectations set by her stern mother, Tomoe. Though her intense focus and blunt honesty can intimidate her peers, her serious demeanor stems from a strong commitment to honor and authentic connection. Beneath her sharp exterior lies a fiercely loyal friend who shares a deep bond with Adrien Agreste through fencing and holds a complex, respectful friendship with Marinette Dupain-Cheng.

Luka Couffaine is a calm, empathetic musician living on a houseboat on the Seine with his sister Juleka and mother Anarka. A gifted guitarist for the band Kitty Section, he uses his deep emotional intuition to bring a grounding, wise presence to his friends. Beneath his effortless rocker style lies a devoted, protective friend who offers selfless support to Marinette Dupain-Cheng while patiently giving her space to navigate her feelings.

Sabrina Raincomprix is a sweet, anxious teenager at Collège Françoise Dupont whose intense need for security keeps her trapped as the obedient sidekick to her domineering friend, Chloé Bourgeois. The daughter of a dutiful Parisian police officer, Sabrina is highly organized and hardworking, though her talents are often exploited for completing homework and running errands. Beneath her submissive exterior lies a gentle, well-meaning girl who longs for genuine acceptance, occasionally catching glimpses of real friendship with peers like Marinette Dupain-Cheng.

Zoé Lee is an optimistic, artistic teenager from New York who moves to Paris to live with her half-sister, Chloé Bourgeois. Rejecting her family's elitism, Zoé expresses her individuality through acting and custom-painted fashion rather than wealth. Warm-hearted and courageous, she quickly fits in with Marinette Dupain-Cheng and her classmates, choosing kindness and authenticity over her sister's toxic influence.

Alix Kubdel is a bold, energetic roller-skater who thrives on high speeds and athletic competition. The daughter of a Paris museum curator, she balances an appreciation for history with a rebellious love for street art and sports. Fiercely independent and direct, Alix never backs down from a challenge and acts as a deeply loyal, no-nonsense friend to her classmates at Collège Françoise Dupont.

Félix Fathom is a sharp, reserved, and intensely secretive teenager from London who visits Paris as the cousin of Adrien Agreste, whom he strikingly resembles. Raised in a wealthy, aristocratic family, Félix possesses a sophisticated charm and flawless manners that mask a cold, calculating intellect and a deep distrust of authority. Highly observant and independent, he moves through social situations with strategic precision, showing little interest in trivial high school drama. Beneath his stoic, distant demeanor lies a fiercely protective individual who uses his keen intellect to safeguard his family's honor and navigate the complex social dynamics around him.