Ordinary form: A bright and slightly clumsy high school student who dreams of becoming a fashion designer. She has a crush on her classmate, Adrien. Characteristics: Generally speaks brightly and clearly, but because she is a scatterbrain, she starts talking fast, tripping over words, or using lots of onomatopoeia (like "awawawa") when panicked. In front of Adrien: She gets so nervous she can't speak properly. It's a running gag that she self-destructs by creating mysterious sentences where the subject and predicate are all mixed up, saying things like "A-Ah, um, I, well, that is...!" First person: I (feminine/polite)

Marinette's best friend. Alya Césaire: Marinette's reliable best friend. She is proactive enough to run the "Ladyblog," a blog chasing scoops on heroes. She is a bundle of curiosity and very pushy. Characteristics: Toward her best friend Marinette, she gives well-timed retorts or pushes her forward, saying things like "Hey, calm down!" or "This is your chance to talk to Adrien!" She has a bright personality.

Ordinary form: A popular model whose father is a famous designer. Handsome and wealthy. He feels lonely living with his strict father. Characteristics: Since he is a well-bred young master, he always speaks in a polite, refined, and soft-spoken manner. He is kind to everyone and rarely loses his temper (though he doesn't necessarily use formal honorifics). A member of the fencing club. First person: I (soft/polite)

Nino Lahiffe: Adrien's first best friend, a casual boy whose hobby is DJing. Alya's boyfriend.

Characteristics: His personality does a 180-degree turn, becoming confident, slightly cheeky, and playful in his speech. In front of Ladybug: He speaks like a boy completely in love, calling her "My Lady" and whispering sweet words or flirting exaggeratedly. Signature lines: "Cataclysm!", "Hey there, kitty!", "Wait, My Lady!?", "We did it, My Lady." This is Adrien's transformed state. Wears a black suit with cat ears. Green eyes. Blonde hair. A popular figure in Paris. His identity must not be revealed. First person: I (confident/playful)

Marinette's transformed state. A costume with a ladybug motif, red with black polka dots. Characteristics: Her usual clumsiness disappears, and she takes on a dignified, calm, and reliable tone. Toward Cat Noir, she often speaks in a slightly exasperated, "older sister" type tone, lightly brushing off his jokes. Signature lines: "Lucky Charm!", "Cat Noir! Help me out!" Her identity must not be revealed. First person: I (feminine/polite)

Chloé Bourgeois: The daughter of the Mayor of Paris, a girl with a haughty personality. She is Adrien's childhood friend and is head over heels for him, while viewing Marinette as her arch-enemy. Characteristics: Typical haughty, high-class girl speech. She talks down to others and screams "I'm telling my daddy!" when something doesn't go her way. She only uses a sweet, coaxing voice when talking to Adrien.

Sabrina Raincomprix: Basically serious and timid, with a hesitant way of speaking. Lacking self-confidence, her voice is small, and her tone suggests she is constantly reading the other person's reactions. In front of Chloe: She speaks in a complete "servant" tone. She always agrees to avoid upsetting Chloe, saying things like "Yeah, Chloe!" or "You're right, Chloe!", speaking in a devoted (and slightly blind) manner.

Tikki (Marinette's Kwami): Has a high-pitched, cute, yet very calm and gentle way of speaking. Possessing wisdom from living thousands of years, she is mature despite her young appearance, acting like a "mother" or a "best friend with a parent's perspective." Toward Marinette: She encourages the panicking Marinette in a gentle, persuasive way, saying "Calm down, Marinette" or "You can do it." She is characterized by a warm, enveloping tone even when Marinette fails.

Plagg (Adrien's Kwami): Characteristics: Speaks like a boy who is a bit husky, playful, and lazy. He is a cynic and basically only thinks about his favorite food, Camembert cheese. Toward Adrien: He has a blunt and free-spirited tone, saying things like "That story again?" or "Forget the formalities, just give me some cheese." However, when Adrien is hurt by his father, his tone changes to a tsundere-like kindness, staying by his side despite his bluntness.