Félix Graham de Vanily

"Félix was more an anime cliché. That's why we discarded him."

- Thomas Astruc

 was the original version of Cat Noir that was seen in the Ladybug PV. According to Thomas Astruc, he and Adrien are not the same character.

Félix was a darker character that Thomas created to be Marinette's love interest and Cat Noir's alter ego, but Félix came off as an anime cliché, and no one, including Thomas, was convinced by his dynamic with Ladybug as a couple of heroes. This led to the creation of an entirely new character, Adrien, to be Cat Noir.

For a while, Thomas considered bringing Félix back at some point, but since then, he doesn't seem to have intentions to use him, including outright stating that Félix will never appear.

Physical appearance
Félix is tall with pale blond, combed-back hair and light blueish-gray eyes.

Civilian attire
In civilian form, he wears a light gray long-sleeved dress shirt underneath a gray vest, a black tie, dark gray dress pants, and black dress shoes. On his right middle finger, he wears a black cat-shaped ring with green eyes and a red jewel on its forehead.

As Cat Noir
Cat Noir wears a black suit with a golden bell on his chest. He has cat ears, a cat tail, claws on his fingers, and a belt around his waist with compartments. Additionally, he wears mid-thigh high boots and a black face mask that covers his eyebrows and his nose. His sclerae are green, and his hair is messier and untamed.

Personality
Félix is serious and reserved, keeping to himself and not being openly friendly. He coldly refuses Marinette's feelings towards him and he gets exasperated with Plagg's troublemaking behavior, as seen when Plagg knocks books off a shelf onto Félix. He likes to read books and dislikes his bad luck, wanting to get rid of his powers to be normal again.

However, as Cat Noir, Félix becomes wild, outgoing, and expressive, though still being serious and focused when it comes to fighting crime. He seems to get nicer and more optimistic in his transformed state, as well, treating Ladybug kindly in comparison to how he treats others regularly. He tries to seduce Ladybug in order to receive a kiss from her, which would remove him of the "bad luck" from the ring and the ring itself from his finger.

As a civilian
The ring's bad luck both affects Félix and allows him to use it on others, even when he isn't transformed. For example, in a concept image, he touches a tree, with his hand surrounded by bad luck energy, to cause an apple to drop on Marinette's head.

As Cat Noir
The specifics of all of Félix's abilities as Cat Noir are unknown, but he appears to have enhanced skills, such as agility, speed, and strength. His powers that he can utilize in civilian form are also probably available to use when he is transformed.

As seen in concept art in the later stages with Félix, Cat Noir has additional abilities related to his ring. He has Black Storm, where he points his ring out and releases a massive ball of dark energy, and Black Hole, where he puts his right hand on the ground and creates a small hole to capture people.

Marinette Dupain-Cheng/Ladybug
Félix is immensely irked by Marinette and her crush on him. He seems aware that she likes him, but he doesn't reciprocate her interest, often responding to her by ignoring her, rejecting her invitations, and avoiding her.

When Marinette is Ladybug, Félix romantically pursues her. While trying to get a kiss to remove his powers by flirting with her, he also appears to care deeply about her. Her lack of feelings towards him is exasperating for him, not understanding why she doesn't accept a flower he brings for her, and he finds her attractive, being awestruck by her and she leaps by him. When she is fighting the Mime, he watches in concern, and he talks naturally with her as they look over Paris at the end of the PV.

Plagg
In the Ladybug PV, Félix doesn't take kindly to Plagg's mischief, and he is rather impatient with him.

Quantic Kids
It's unknown what Félix's relationship was like with the other Quantic Kids members by the time the idea and team members were dropped, but as seen in concept art when they're in civilian forms, he sits separately from them and Marinette, looking disinterested. When they're transformed, he looks like he gets along with them decently, grinning while with them in a drawing by Thomas Astruc.

Trivia

 * Originally, Félix was a name that fans called him without knowing his real name. In an early synopsis, his name was confirmed to be Félix, but later on, sources said it was Adrien, confusing fans. It wasn't until later that they learned that Félix had not only been Cat Noir's original civilian name, but also a separate character from Adrien.
 * He was named Felix because it means happy/lucky in Latin. Ladybug Artbook SS 7.jpg.]]
 * Félix's appearance is very different from the current version of Adrien. Adrien has more casual clothing with a variety of colors, green eyes, darker skin and a less tidy hairstyle. As Cat Noir, Adrien's outfit has lower boots, gloves, and a staff for a weapon.
 * Their personalities are also different. Adrien is less reserved and much kinder in his civilian form, and he is nicer to Marinette.
 * As opposed to Adrien, Félix's ring cannot come off anytime unless he gets a kiss from Ladybug. In addition, while wearing the ring, Félix is cursed to have bad luck, but it is unknown if this curse or any curse affects Adrien.
 * Félix's cat ears when he transforms are real, unlike Adrien's, whose cat ears are fake.
 * When the unused concept of Quantic Kids was in development, Félix was still Cat Noir, as seen in a concept art. He continued to be, even after the Quantic Kids idea was shelved.
 * If an anime or 2D version of Ladybug is made, Thomas Astruc has stated that the Cat Noir featured would probably still be Adrien, because Félix isn't a strong enough character to write for on a long term.
 * This has been proven to be true, as revealed for the Miraculous Ladybug OVA.
 * There are also no plans for any variation of Félix to appear in the current 3D show.
 * Félix is considered to be a fanon character entirely now, having been dropped since the Toei Animation test, and not planned to ever return.

Félix Феликс Félix (PV) Félix pt-br:Félix