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Adrien Agreste is one of the main protagonists of Miraculous: Tales of Ladybug & Cat Noir. He is a student in Miss Bustier's class at Collège Françoise Dupont in Paris, France. He is also a fashion model for his father's line. With his magical ring, inhabited by a kwami named Plagg, Adrien gains the power of bad luck and destruction, transforming him into the superhero Cat Noir ("Chat Noir" in the French version).
Adrien is about half a head taller than Marinette. He has brushed-back blond hair and light green eyes. His skin tone is fair with a rosy tint, especially around his cheeks, nose, and the tips of his ears.
He wears a white over-shirt with an upturned collar and sleeves rolled up above his elbow. Underneath, he wears a black shirt with five horizontal stripes around the chest which are colored, from top to bottom, yellow, olive green, bright green, dark green, and periwinkle. On the ring finger of his right hand, he wears a silver-colored ring that he uses to transform into Cat Noir. Additionally, he wears blue jeans and orange sneakers with white laces and a logo of a black butterfly in a circle on the sides.
As Cat Noir, he wears a textured black skin-tight catsuit with metal details and a golden bell on his chest. The bell is connected to a zipper on the front of his costume. He has a long belt that wraps around his waist and hangs out from the back like a tail. He wears matching gloves that have claws on the fingertips, and boots with a hidden wedge and silver toes. He wears black cat ears and a black mask covering around his eyes. His eyes are cat-like with green sclerae, dark green iris, and oblong pupils. His hair becomes longer and untamed, covering his normal ears. His ring turns black and gains a bright green paw print in the face of the ring.
Adrien is charismatic as well as shy and a bit reserved. While liking to have fun, he is more serious, obedient, and less lively due to his strict upbringing. If something makes him sad, he tries to downplay his feelings on it, like his relationship with his father. He thinks reasonably, and he will express annoyance and frustration when someone is being difficult or something is going wrong. Though not very openly emotional or affectionate to most people, he is friendly and encouraging. He has an easier time letting his feelings show to those who he's close to.
As Cat Noir, Adrien has the freedom to act however he wants outside of his normal life and lets his wilder side come out, being cocky and outgoing. More optimistic and open, Cat Noir says whatever comes to his mind and makes a lot of jokes and puns, many being cat-related. In his attempts to get Ladybug's attention, along with other people, he brags and boasts about himself but he's not arrogant: His change to his superhero status doesn't diminish his kindness and concern for others, among a lot of his other personality traits like irritation proneness and loyalty. While more prone to goofing off, Cat Noir gets serious when needed, like when fighting an akumatized villain. It's rare for him to reveal his vulnerable, Adrien-like side, but it does come through at times, such as quietly commenting that not all parents are loving in "The Bubbler" and trying in vain to tell Ladybug about his love for her before their transformations wear off in "Dark Cupid". Determined to help others and save the day, Cat Noir really cherishes being uninhibited by his civilian life as a superhero.