Alyadrien

Alyadrien is the het ship between Adrien Agreste and Alya Césaire from the Miraculous Ladybug fandom.

Canon
Outside their shared friendships with Marinette and Nino, Adrien and Alya know very little about each other, but they do seem to get along with each other quick well during group activists with their friends and classmates. Adrien knows that Alya is actually Rena Rouge, while Alya is unaware that Adrien is secretly Cat Noir.

Season Two
Shortly after Alya's little twin sisters were akumatized into Sapotis, they were multiplying by the minute. They needed help in stopping them, and Cat Noir is amazed with the new fox-themed heroin that Ladybug recruited to help. After displaying her fighting skills Cat Noir welcomes Alya, who introduces herself as Rena Rouge. He welcomes her to the team by kissing her hand, along with jovially offering Rena Rouge any superhero advice if needed. When Rena Rouge coyly asks Cat Noir for Ladybug's phone number, he says that he has a good feeling that working with her is going to be a lot of fun.

When animals from the zoo escaped in "Syren", Cat Noir is happy have Rena Rouge helping him and Ladybug again, and as he draws the panthers in Rena Rouge uses the Fox Miraculous' abilities to round them up. Afterwards, on their way back to the zoo, Ladybug and Rena Rouge part ways with Cat Noir, who wasn't happy about the idea of him not being allowed to know who Rena Rouge really is. As he believes that he has a right to know, along with the other things that Ladybug refuses to share with him.

Due to the Skype call Adrien was on with Marinette in "Anansi", he became aware of the danger that Alya, Marinette and Nino were in when Ayla's akumatized older sister attacks them as the titled villain and races to their aid as Cat Noir.

Season Three
In "Reflekdoll", Ayla asks Adrien to help her and the girls with his knowledge on modeling, since he is one and can help Juleka showcase Marinette's designs for her website, Adrien wanted to help but his schedule keeps him from staying out for too long, until he is reminded of the task that his cancelled class gives him a few hours of free time before he suppose to be home. The true reason that Ayla asked Adrien is so he and Marinette can spend some time together. When Juleka showed signs of being way too nervous for the shoot, Ayla suggests that Marinette models them and Adrien should too beside her, since the clothes and jewellery can be for both genders. Ayla made the suggestion, along with a few others, to keep Adrien from leaving too early.

Season Four
In "Rocketear," it's shown that Rena Rouge and Chat Noir are together romantically in the in-series Miraculous movie. Even Ladybug in the movie supported them. Later, Nino sees three kids role-playing as Ladybug, Cat Noir and Rena Rouge. The kid that is Cat Noir is with the kid that is Rena Rouge. The kid that is Ladybug says that Cat Noir is in love with Ladybug, not Rena Rouge, to which the kid that is Cat Noir says that he's Cat Noir and all of the girls love him. The three kids then run away laughing. Nino also watches a video on the Ladyblog of Alya talking about Cat Noir. Alya describes Cat Noir as "a superhero super amazing! Super brave! Funny! Cute..." and "a charming prince."

Nino calls Adrien and tells him that Alya is in love with Cat Noir. Adrien denies it, but Nino insists. After Nino says he will find proof and hangs up, Plagg says that his "natural charisma" has contaminated Adrien. Adrien transforms into Cat Noir and goes to visit Alya since he has to be sure that Alya didn't accidentally fall in love with him. Cat Noir confronts Alya about being in love with him, which Nino oversees. Alya tells Cat Noir that she doesn't feel anything and feels love for her boyfriend instead. They hug, which Nino misunderstands and runs away crying.

The next day, Nino shows his evidence to Adrien. Adrien, knowing what actually happened, denies Nino's evidence but can't tell Nino the exact details since he wasn't there. Nino reveals his and Alya's identities as Carapace and Rena Rouge. Despite being shocked by everything, Adrien still denies that there is something between Rena Rouge and Cat Noir. Nino is akumatized into Rocketear.

In "Hack San", Chat Noir and Scarabella (Alya's name with the ladybug's miraculous) worked together. At the beginning Chat Noir couldn't accept that there was another Ladybug, but at the end they could work together and Chat Noir accepted her, becoming fellow heroe parters.

Fanon
While the two have little interaction with each other outside of school and their occasional shared superhero duties, whenever Ladybug calls upon Rena Rouge to help them, they have been able to do a few fun activities together with Marinette, Nino and the rest of their classmates in the series, and that could be why fans have decided to ship them together. As Rena Rouge and Cat Noir, when they don't know the other's true identity, they are very flirty together, which also fueled some shipping, especially as it could imply Alya has a sort of celebrity crush on Cat Noir.

Since Timetagger reveals that during the time of their adulthood, Ladybug and Cat Noir have assembled a team of Miraculous holders, that might have Alya as one of its members.

Fandom
FAN FICTION
 * Adrien/Alya tag on FanFiction.Net
 * Adrien/Alya tag on FanFiction.Net
 * Adrien/Alya tag on FanFiction.Net

TUMBLR

WIKIS
 * on the
 * on the

Variations

 * Alukadrigamininette refers to the ship between the two, Marinette Dupain-Cheng, Nino Lahiffe Luka Couffaine and Kagami Tsurugi
 * Mariadrienalyanino refers to the ship between the two, Marinette Dupain-Cheng and Nino Lahiffe
 * Miraculous Gang refers to the ship between the two, Marinette Dupain-Cheng, Nino Lahiffe and Chloé Bourgeois