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Alya Césaire, known as Rena Rouge is one of the supporting characters of Miraculous: Tales of Ladybug & Cat Noir.

In "Lady Wifi", after Alya gets suspended from school because of Chloé Bourgeois, she gets akumatized by Hawk Moth and becomes Lady Wifi, a supervillain whose powers come from her smartphone and its Wi-Fi signal.

In "Sapotis", after she receives the Fox Miraculous from Ladybug, when the Miraculous is inhabited by Trixx, becomes Rena Rouge, a fox-themed superhero who helps Ladybug and Cat Noir "during particularly difficult missions" in the second season and beyond.

In "Mayura", during the fight with Scarlet Moth, Rena Rouge is akumatized into Rena Rage, a fox-themed supervillain.

In "Oblivio", due to her and Nino's embarrassment at being caught playing the Super Penguino video game together, she, alongside Nino, are both akumatized into Oblivio, a memory-erasing supervillain.

In "Félix", after being fooled by Félix to think that Adrien didn't appreciate his friends, she is re-akumatized into Lady Wifi, along with Reflekta and Princess Fragrance, the three supervillains form The Punishers Trio, a group of supervillains who want to get revenge on Adrien, later Félix.

In "Gang of Secrets", after Marinette keeps hiding secrets from them, Alya is re-akumatized by Shadow Moth into Lady Wifi along with Reflekta, Princess Fragrance, Timebreaker and Horrificator, the five supervillains all form the Gang of Secrets, a group of supervillains who want to reveal Marinette's secrets. However, Alya was able to resist Shadow Moth while akumatized, which allowed her to transform back to normal. Ladybug returns the Fox Miraculous to become Rena Rouge. At the end of the episode, Marinette tells Alya that she is Ladybug.

As of "Optigami", she is now a permanent holder of the Fox Miraculous. She also becomes Marinette's successor presumptive for the ownship of the Miracle Box.

During the events of "Sentibubbler", she created an illusion of Ladybug, which said Alya would no longer use the Fox Miraculous, allowing Alya and her family to be freed from any future threats from Shadow Moth. This forces Alya to only use her miraculous behind the scenes, at least until Shadow Moth is defeated.

As of "Rocketear", after putting herself in a position where her hero persona could no longer be seen in public and where she could only assist her allies from the shadows, her costume changes and she decides that she is now Rena Furtive.


Alya is rather energetic, passionate, and funny, confident, yet down to earth. Alya's foresight has come in handy many times. After Marinette thinks she accidentally lost a video of Ladybug on Alya's cellphone, she explains that she had already posted the video on her blog, mindful that something might go wrong when she showed her clumsy friend the video. When it comes to anything involving Ladybug and Cat Noir, she easily becomes very excited and basically has a single goal of updating her blog as soon as possible, such as when she is kidnapped by the Pharaoh to be a sacrifice yet still records herself and live streams the video on her blog. Sometimes, she goes too far, such as spying on Chloé's locker, which results in her getting punished by Mr. Damocles.

Alya doesn't like being undermined or doubted by others, especially when it comes to her work. If someone points out something wrong to her, she is too stubborn to admit they are right. Although her research is generally right when she takes her time, Alya tends to jump to conclusions, like quickly suspecting Chloé of being Ladybug after seeing the girl with her own Ladybug suit and toy yo-yo and mistaking them for the real ones. She also has a habit of never checking her sources or doing ethical investigating of her blog posts, while demanding others to provide proof for their claims, even though she doesn't do that herself often.

Alya is extremely loyal, supportive, helpful, and sometimes pushy, such as when she goes out of her way to encourage and (sometimes literally) push Marinette into spending time with Adrien. She is also very stubborn when it comes to doing things her way, such as the photoshoot of Marinette's fashion line. Another side to her is that she can be a bit demanding at times just as keeping Nino in line about revealing Marinette's crush on Adrien. Alya has a dramatic side to her personality, such as when she pretends to be a unicorn with Manon and later makes an excuse to Adrien's photographer, who asks her to be a support model for Adrien, so Marinette can do the modeling instead. Having to babysit her younger siblings at home, she is great with kids, though sometimes she pushes her responsibility of watching them on Marinette so she can go on dates with Nino.

As described by Cat Noir in "The Pharaoh", Alya is a "brave chick", unafraid to get close to villains in her pursuit of the truth, tending to forget her safety at times and needing rescue by the very superheroes she is filming. As Ladybug, Marinette calls Alya bossy, feisty, and bold. Her bravery and determination has helped both civilians and superheroes, such as when she makes a plan with her classmates to save Marinette and sacrifices herself in the process or rides a bike to distract Gigantitan from harming Ladybug, showing a more compassionate side towards her beloved ones in danger and great skills in leadership.

Alya holds great admiration and respect for the two superheroes, especially Ladybug, wishing to know anything and everything about her. Much more, she wildly dreams of knowing Ladybug's identity, not once thinking about the consequences of posting the information on her blog, as Marinette pointed out to her in several episodes. However, she would respect her desire to keep it secret. Alya wishes to work alongside her, her dream coming true when the superheroine chooses her to wield the Fox Miraculous and asks her for her help in defeating Sapotis. She greatly values the trust Ladybug has in her, making her someone of her word above her burning desire to continue helping her teammates and thus giving her Miraculous back.

During a trip to the Wax Museum, Alya showed concern seeing a statue of her akumatized alter ego feeling remorseful about her actions.

Her willingness to learn from her mistakes is shown once again in "Optigami". Despite respecting Ladybug as the guardian and as her best friend, she acts impulsively by taking the Turtle Miraculous when it was not required in Ladybug's plan. Just as easily as she fell for Lila's deception in the past, Alya ends up being fooled by Hawk Moth's tricks. When Ladybug quickly exposes the identity of Sentinino, Alya becomes devastated at the realization that her impulsiveness almost turned catastrophic. This event prompts her to self-reflect, ultimately learning from her mistake which earns Ladybug's decision of turning her into a permanent miraculous holder.

As Rena Rouge, Alya retains most of her personality traits such as her undying loyalty, trustworthiness, and curiosity. She is supportive of her allies, whom she gets very excited about working with, causing her to be a bit of a scatterbrain. A fast learner, she takes quickly to her abilities.

As Lady Wifi, her desire for answers increases considerably. Despising Ladybug's secrecy, she will stop at nothing to find out her secret identity, even if it means exposing a horrible person underneath, such as when she believes that Chloé is Ladybug. Her speediness to update onlookers remains the same, but her methods for finding info become sneakier than her normal self.

As Rena Rage, her personality as Rena Rouge seems to inverse, making her cruel and aggressive.

As Oblivio, she wants nothing more than to erase the memories of everyone in Paris.



As a result, she is given a necklace known as the Fox Miraculous, which when worn grant Alya the ability to transform into Rena Rouge, her superhero alias.

As the holder of a Miraculous, Alya is assisted by a small orange creature resembling a fox called Trixx, who is a magical being known as a Kwami. As Rena Rouge, Alya's signature ability is Illusion.

  • Hallucikinesis: her special power, Mirage, allows her to create illusions by playing her flute, generating an orange beam of light and then throwing the beam to generate the illusion.
  • Supernatural agility: she is able to jump higher than anyone else without the need of her tool to travel by.

As Lady Wifi

  • Datakinesis: she swaps icons from her phone.
  • Digital teleportation: using phones and antennas, she can teleport anywhere in Paris.

As Oblivio

  • Memory erasure
  • Super strength
  • Intangibility


  • Blogging: she is able to run multiple blogs.
  • Reporting: she makes well-said reports when she talks about Ladybug.


She is a student.


  • She is one of the superheroes who doesn't get akumatized into her previous akumatized form.