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|“||They've been keeping you from achieving your dream for way too long. I will go to any length to end the reign of Ladybug and Cat Noir.||”|
In "Mayura", in order to save Hawk Moth from the French Miraculous superhero team, Nathalie uses the Peacock Miraculous. When the Peacock Miraculous is inhabited by Duusu, she becomes Mayura, the secondary antagonist of Miraculous: Tales of Ladybug & Cat Noir. She helps Hawk Moth by creating allies for akumatized villains.
Nathalie stands at an average adult height. She has pale skin, dull blue eyes, and black hair with the left side of her head that is dyed a dark pink or red color. Her hair is pulled back into a bun with the hair on top, while a piece hanging over her face.
Nathalie has glasses with black and red striped frames and she wears periwinkle eyeshadow. She wears a red turtleneck sweater, a black dress jacket, black pants and black medium-heel shoes. She also has round creamy-white earrings.
Mayura's eyes have pink irises and scleras that are pink which fade into dark indigo, and there is black liner around her eyes, resembling glasses. Her skin is a light indigo and her hair is dark blue, and part of it curls up underneath her left eye. She wears a peacock-feather-like cocktail hat, which is blue and tear-shaped with a light pink mark in the center and a light blue, translucent veil over her right eye. She wears a blue dress with a fuzzy black collar and sleeves that end in a point on the back of her hand. The dress appears to have a set hexagonal texture, as well as a Peacock Miraculous in the center. The bottom of the dress has a front-slit skirt, and the end of the skirt has rounded points with dark blue, light-pink-centered spots, resembling a peacock's tail feathers. The rounded points are edged with translucent light blue material. Underneath the dress, she has translucent indigo tights that are opaque from the knees down, making the opaque section resemble high-heeled boots. She also holds a blue hand fan.
Catalyst has periwinkle skin. Over her head, while leaving her mouth exposed, she wears a black helmet with a red visor with black edges and a red spike pointing towards the back of her head. Catalyst also wears a black dress suit with stiff shoulders, including a dark red front and swan neck collar that features a red downward-arrow-shaped section in the center. The sleeves cover her entire arms, with the tips of her fingers fading into red. Also, Catalyst has pocket-like ridges on each side of her hips, and her pant legs come down to her feet, having red high-heels, soles, and tips.
Nathalie is a serious and formal woman who works very diligently as Gabriel Agreste's assistant. She has a cold and distant demeanor as she doesn't openly show her emotions around others most of the time. Her will is strong, remaining unfazed when persons of greater authority like Audrey Bourgeois yelled at her, knowing the latter couldn't actually affect her and smiled with satisfaction after the event. Objective, sensible, and understanding, Nathalie is able to reason with both Gabriel and Adrien whenever they are acting inconsiderately or emotionally, sometimes in relation to each other. While not warm, she can be cordial and polite.
However, in situations where she is dealing with Gabriel, Nathalie becomes nervous, being afraid to disappoint him. Her desire to be on his good side leads her to unfair actions, such as giving Adrien a birthday gift and claiming it is from Gabriel when it is actually from Marinette. Despite this, she doesn't always obey Gabriel's orders or has acted rebelliously, as seen in "Oni-Chan" when she let Lila enter with the intention to help Adrien, not knowing she was being manipulated in that moment. This was seen again in "Ladybug" but to a more dangerous step, as she used the then damaged Peacock Miraculous despite her more delicate condition.
Although she doesn't usually openly show it, Nathalie desires what is best for the Agreste family and often hopes that Gabriel would pass more time with Adrien instead of acting as a villain.. However, her concern is limited to the Agreste family only and she doesn't seem to care about the other Parisians' well-being. In fact, Nathalie obeys Gabriel's orders and helps him with his plans with fierce dedication and loyalty, no matter how morally wrong they are, so he could accomplish his goal and thus finish his time as Hawk Moth. She takes sadistic joy in fooling the heroes into thinking they can win.
Even though she has a cool and calm demeanor, Nathalie can lose her temper on occasion and would disregard any detrimental consequences as a result. She can get frustrated by the fact that her boss is failing and even goes as far as letting herself be harmed in order to success, which actually make many plans successful. Despite this, Nathalie admits that the job is sometimes too much. As shown in "Ladybug", Nathalie apparently sees the sentimonsters she creates as Mayura as beings who only do her bidding, having no remorse when it comes to killing the titular sentimonster when it was convenient for her.
As a civilian
Nathalie is an effective assistant, able to take care of Gabriel's fashion work, look out for superheroes and potential akuma victims, and organize Adrien's strict schedule. Additionally, Nathalie has capable teaching abilities, as shown during Adrien's homeschool period.
Like her boss, Nathalie is insightful and cunning. She had the idea to use Lila's lying ability to cause stress to Chloé, who indirectly caused a very powerful akumatized villain and caused eventual doubt in the former superheroine. In the episode “Félix”, she displayed notable unarmed combat skills.
Her plan of impersonating Ladybug with the Sentimonster Ladybug to get the Cat Miraculous had a considerable chance to succeed, but ultimately failed.
Throughout most of her appearances, Nathalie has proved to be talented with the element of stealth. She is good at hiding herself and take advantage of distractions to sneak without anyone notice. This ability allowed her to evade professional guards and steal Fu's tablet with the deciphered spellbook pages.
Mayura has enhanced physical characteristics: speed, strength, and agility. She showed considerable hand-to-hand combat skills against more experienced combatants. However, her illness started to weaken her physical prowess even in her enhanced state.
Mayura is able to infuse a feather plucked from her hand fan with her power, transforming it into an Amok, and send it out to possess an object owned by a chosen target, with whom she can communicate telepathically. While she is communicating, a blue curved peacock mask appears in front of her and her target's faces. Her actions will then give an emotion from her target a physical form of that person's choosing, which would act as the target's ally until recalled via a snap of her fingers, which destroys it.
Even if she didn't create them, Mayura can either bring back to life dormant sentimonsters or destroy them through their amoks. This ability was first seen in "Feast".
Catalyst has the power to multiply/enhance/increase someone's powers; infusing scarlet energy into an object belonging to her target, similar to an akumatized object. When affected, the person gains a red-colored outfit. In Hawk Moth's case, this power allows him to akumatize multiple butterflies and transform multiple people at once. Catalyst can also communicate with the person she enhanced, during which a red sharp-edged butterfly mask appears in front of both of their faces, similar to Hawk Moth.
Nathalie works professionally as Gabriel's assistant, making sure to take care of all of his requests and looks after his son. Occasionally, she tends to get nervous when dealing with him, such as when she forgot to buy a gift for Adrien on his behalf, leading her to lie and tell Adrien that Marinette's gift was actually from his father. Although wary of him becoming disappointed with her, Nathalie is willing to stand up to him for Adrien's sake, as when she voiced her displeasure with him for being too distracted by his missing wife to see his own son's misery during "Santa Claws".
In "The Collector", it is revealed that Nathalie is aware that Gabriel is Hawk Moth. In "Queen Wasp" indicates that she has deep feelings for Gabriel, being relieved when he decides to stop being Hawk Moth for his own well-being, but she is devastated when he changes his mind because he loves Emilie too much. Her loyalty is so strong that in "Catalyst", she helps with his plan for taking Ladybug's and Cat Noir’s Miraculouses by allowing him to akumatize her. Since "Mayura", Nathalie risks herself by using the damaged Peacock Miraculous to transform a villain in order to help Hawk Moth in his plans.
According to her in "Stormy Weather 2", Nathalie admits having deep admiration for Gabriel and knows that it has presumably morphed into romantic feelings. In "Reflekdoll", after their failure with Reflekta, she reminded him that they're stronger together in their following attempts, which resulted to be true. Despite her devotion, in "Ladybug", she disregarded his orders and concocted her own plan for getting the heroes' Miraculous, aware of Gabriel's desperation. But when she was told that her time as Mayura was over, Nathalie accepted that and knew he could call on her at any time.
Nathalie is usually serious around Adrien, not being very warm or close to him though she is his current main caretaker. Despite this, she does care for him, which she shows when she requests to Gabriel that Adrien be allowed to go to school after seeing how much he wanted to attend. In "Santa Claws", she sees how sad he is about his father not celebrating Christmas and asks Gabriel to spend time with his son. She even softly smiles at Adrien's joy at his friends being allowed into the mansion on Christmas. She showed concern for him when Gabriel took a big risk in "Style Queen".
In "Stormy Weather 2", Nathalie claims to have developed a great sense of affection for Adrien as she watched him grow up.
Nathalie is unaware that Adrien is Cat Noir. However, she despises the hero and wants to help Gabriel take his Miraculous from him, even telling Hawk Moth that she'll go to any lengths to end his reign. However, in "Startrain", she expressed hope that the hero would rescue Adrien when he and his class were blasted into space.
In a alternate future, Nathalie had been horrified when she learned of Cat Noir's secret identity.
Nathalie uses him to transform into Mayura. While their relationship hasn't been much explored, it is clear that Duusu enjoys the chaos his owner causes (possibly for his moody personality) and cares for her, as he gets upset when Nathalie collapses after using the Peacock Miraculous in "Reflekdoll". As for Nathalie, she doesn't seem to heed Duusu's advice in "Ladybug", preferring to transform and create the ultimate sentimonster.
While their relationship hasn't been much explored, it is stated in "Stormy Weather 2" that Nathalie is deeply affected by Emilie's coma, becoming more saddened for her as time passes.
Nathalie has seldom encountered Marinette personally, only seeing her in person during the derby hat competition in "Mr. Pigeon" and briefly interacting with her in "Style Queen". On Adrien's birthday in "The Bubbler", she treats Marinette formally when on a speaker, but disregards her by claiming to Adrien that Marinette's gift was from Gabriel.
Nathalie is unaware that Marinette is Ladybug. However, she despises the hero and wishes to help Gabriel take her Miraculous, even telling Hawk Moth that she'll go to any lengths to end her reign. However, in "Startrain", she expressed hope that the heroine would rescue Adrien when he and his class were blasted into space.
Like most Parisian citizens, Nathalie is aware that Chloé is Queen Bee. Though she does express a little bit of doubt about it, she willingly helps Gabriel in his plot to bring Chloé over to his side. As Mayura, while battling her, she tried to persuade Chloé into joining her and Hawk Moth by saying that if she did, she could be Queen Bee whenever she liked, though Chloé refused that time. However, in Miracle Queen, Chloe was mad at Ladybug for the fact that she never gave her the Bee Miraculous and joined Hawk Moth, only to be defeated by Dragon Bug and Snake Noir before Master Fu announced Ladybug as the new Miraculous guardian and henceforth losing his memories.
|Miraculous: Tales of Ladybug & Cat Noir Theme Song:||Absent|
|1. "The Bubbler":||Appears||14. "Princess Fragrance":||Absent|
|2. "Mr. Pigeon":||Appears||15. "Ladybug & Cat Noir":||Appears|
|3. "Stormy Weather":||Absent||16. "Stoneheart":||Appears|
|4. "Timebreaker":||Absent||17. "Animan":||Absent|
|5. "Copycat":||Absent||18. "Simon Says":||Appears|
|6. "The Pharaoh":||Absent||19. "Pixelator":||Absent|
|7. "Lady Wifi":||Absent||20. "Guitar Villain":||Absent|
|8. "The Evillustrator":||Absent||21. "Kung Food":||Absent|
|9. "Rogercop":||Absent||22. "Gamer":||Absent|
|10. "Dark Cupid":||Absent||23. "Reflekta":||Absent|
|11. "Horrificator":||Absent||24. "The Puppeteer":||Absent|
|12. "Darkblade":||Absent||25. "Antibug":||Absent|
|13. "The Mime":||Appears||26. "Volpina":||Appears|
|Miraculous: Tales of Ladybug & Cat Noir Theme Song:||Silhouette|
|1. "Santa Claws":||Appears||14. "Frightningale":||Appears|
|2. "The Collector":||Appears||15. "Syren":||Appears|
|3. "Prime Queen":||Absent||16. "Zombizou":||Absent|
|4. "Despair Bear":||Absent||17. "Frozer":||Background|
|5. "Riposte":||Absent||18. "Style Queen":||Appears|
|6. "Befana":||Absent||19. "Troublemaker":||Absent|
|7. "Robostus":||Absent||20. "Queen Wasp":||Appears|
|8. "The Dark Owl":||Absent||21. "Reverser":||Absent|
|9. "Gigantitan":||Absent||22. "Anansi":||Absent|
|10. "Glaciator":||Appears||23. "Malediktator":||Absent|
|11. "Sapotis":||Absent||24. "Sandboy":||Appears|
|12. "Gorizilla":||Appears||25. "Catalyst":||Appears|
|13. "Captain Hardrock":||Appears||26. "Mayura":||Appears|
|Miraculous: Tales of Ladybug & Cat Noir Theme Song:||Silhouette|
|1. "Chameleon":||Absent||14. "Stormy Weather 2":||Appears|
|2. "Animaestro":||Appears||15. "Kwamibuster":||Absent|
|3. "Bakerix":||Absent||16. "Feast":||Appears|
|4. "Backwarder":||Absent||17. "Reflekdoll":||Appears|
|5. "Gamer 2.0":||Absent||18. "Ikari Gozen":||Absent|
|6. "Weredad":||Appears||19. "Desperada":||Absent|
|7. "Silencer":||Absent||20. "Startrain":||Appears|
|8. "Oni-Chan":||Appears||21. "Timetagger":||Appears|
|9. "Miraculer":||Appears||22. "Cat Blanc":||Appears|
|10. "Oblivio":||Pictured||23. "Félix":||Appears|
|11. "Party Crasher":||Appears||24. "Ladybug":||Appears|
|12. "Christmaster":||Absent||25. "Heart Hunter":||Appears|
|13. "The Puppeteer 2":||Appears||26. "Miracle Queen":||Appears|
|Super Lady Luck:||Absent||Miraculous Mission Ladybug:||Absent|
|Throwdown!:||Absent||Ladybug Contra os Vilões:||Absent|
|Miraculous Ladybug & Cat Noir:||Pictured||Miraculous Crush:||Absent|
- The name Nathalie means "Christmas Day/Christmas".
- Nathalie's surname Sancoeur ("sans cœur") means "heartless" or "without a heart" in French.
- Nathalie appears to be left-handed as she does most things with her left hand like holding a stylus in her left hand during "Ladybug and Cat Noir (Origins - Part 1)".
- Nathalie is the only person in the present who knows that Gabriel Agreste is Hawk Moth.
- By the time Bunnyx is an adult, she is also aware of who Hawk Moth is.
- Nathalie is the first character to explicitly be willingly akumatized (aside from Gabriel Agreste akumatizing himself in "The Collector"), although Lila Rossi's smirk after her de-evilization implies she may have also been willing to serve his scheme.
- Nathalie appears to be suffering from prolonged health issues as a result of using the Peacock Miraculous.
- Without her Gabriel never would have found both Peacock and Butterfly Miraculouses.
- The name Mayura in Sanskrit means peacock, one of the sacred birds in Hindu mythology. It is also a contemporary Hindu name used in many parts of India.
- While the villain is female, Mayura is specifically the term for males while Mayuri is the term for females.
- Mayura was revealed at the Miraculous panel at New York Comic Con 2016 under the name "Le Paon" (French for "The Peacock").
- Earlier, at a panel at San Diego Comic Con, Thomas Astruc pointed to an image of her in the sneak peek collage image, commenting that she will be a new recurring supervillain that will be Hawk Moth's ally.
- Her final name was revealed at a TF1 press conference advertising the upcoming Season 3.
- Mayura's civilian identity was revealed by the end of Season 2.
- There were also clues about her in the opening theme song for the season.
- She's the second Miraculous holder to use their power for evil after Gabriel Agreste.
- She is the first villain in the series to both directly and permanently kill another character by voluntarily taking back the Ladybug Sentimonster's Amok back after she betrayed her to side with the real Ladybug and Cat Noir.
- She's the first Miraculous holder whose skin tone changes color when she transforms.
- Following Alya Césaire, Nino Lahiffe, and Chloé Bourgeois, Nathalie is the fourth person to become a Miraculous holder and akumatized villain, excluding Gabriel, who akumatized himself.
- Nathalie's akumatized form, Catalyst, was first revealed in a promotional video for Season 2 from TFOU.
- Catalyst also shares a resemblance with the Collector's design as they both have purplish skin, red glass over their eyes and black dress suits with stiff shoulders.
- Catalyst is so far the only akumatized villain not to be defeated by the French Miraculous superhero team and the only one they are not aware of.
- Catalyst is also the first akumatized villain to enter Hawk Moth's lair, aside from The Collector.
- She is also the first akumatized villain who didn't directly fight Ladybug and Cat Noir.
- In a video interview held on August 25, Jeremy Zag mentioned that the new main villain will make Hawk Moth appear like "a baby" in comparison. It is unknown if this villain is Mayura.
- She was said to appear as Hawk Moth's "boss" in Season 3.
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