Miraculous: Age of Ladybug

 is an American action-adventure-thriller magical girl superhero fanfiction series based on  by Thomas Astruc, being written by Lara Davis aka Ladyhug13 and published since December 15th, 2019.

Synopsis
Marinette Dupain-Cheng is entrusted with a device called a miraculous as she defends Paris from supervillains.

Main

 * Marinette Dupain-Cheng/Ladybug - a shy and introverted teenage girl who is chosen to wield a mystical device called the Ladybug Miraculous.
 * Tikki - a friendly kwami who is capable of transforming Marinette into Ladybug.
 * Adrien Agreste/Cat Noir - the cold and distant son of fashion mogul Gabriel Agreste who yet surprisingly likes Marinette as he's entrusted with the Cat Miraculous, becoming slightly more goofy when wearing it.
 * Plagg - a hungry and rather goofy kwami who is capable of transforming Adrien into Cat Noir.

Supporting

 * Tom Dupain and Sabine Cheng - Marinette's friendly parents who completely support her no matter what.
 * Wang Fu - the ancient guardian of the Miraculous Box who gave both Adrien and Marinette their Miraculouses as he also used to mentor Gabriel and Emilie before both of them betrayed him to conquer Paris, with him refusing to give Gabriel the Miraculouses he needs to resurrect his wife when the Peacock Miraculous killed her.
 * Alix Kubdel - Marinette's tomboyish second best friend who is both dealing with conflicting sexuality and pressure from her father to go in the family business.
 * Nino Lahiffe/Carapace - Adrien's best friend who constantly tries to see the bright side of things despite being a target of bullying.
 * Luka Couffaine - a very friendly teenager who loves to play the guitar, mainly due to it being the last gift his father gave to him before he mysteriously died.
 * Chloé Bourgeois - a supposedly rich and conceited teenage girl who is revealed to have a similar home life to Adrien as her stress is making her seem a bit more hostile towards people.
 * Sabrina Raincomprix - Chloé's shy and timid best friend who is Chloé's moral compass at times.
 * Ivan Bruel - a strong student who despite his size is actually surprisingly very kind.
 * Kagami Tsurugi - a near emotionless student who has been completely shunned by her mother and is primarily focused on her goals at hand.
 * Juleka Couffaine - Luka's twin sister who is extremely shy and nervous around people as she finds that making friends could be dangerous.
 * Rose Lavillant - a bubbly teenage girl who is Juleka's best friend and enjoys her presence.
 * Lê Chiến Kim - an egotistical yet somewhat friendly teenager who is known for being somewhat of a goofster.
 * Ms. Caline Bustier - a friendly and caring teacher at Françoise Dupont who finds Adrien to be the son she never had.
 * Lt. Roger Raincomprix - Sabrina's father who is the only cop not under André's payroll.
 * Nora Césaire - Alya's older sister who has been doing underground boxing to help provide after their parents abandoned them, also being unaware of her sister being in league with Hawk Moth.
 * Alim Kubdel - Alix's father who somewhat cares for her but often pushes way too much on her shoulders.
 * Jalil Kubdel - Alix's geeky older brother who has a passion and interest in history.
 * Tomoe Tsurugi - Kagami's honor obsessed mother who prevents her from disobeying her at all.
 * Jagged Stone - a famous rock star who is under Roth’s label who despite his popularity is surprisingly humble and is friends with Marinette, finding her to be a good fashion designer.
 * Clara Nightingale - a pop star who is under Roth's label who is constantly objectified and harassed by him.
 * Nadja Chamack - a famous news reporter known for her obsession with getting the story right.

Antagonists

 * Gabriel Agreste/Hawk Moth - the cynical father of Adrien who is secretly a vicious super villain who is capable of corrupting anyone with negative emotions and wants all of the Miraculouses to resurrect his dead wife.
 * Nathalie Sancoeur/Mayura - Hawk Moth's assistant who both has a hidden crush on him and can summon massive creatures called Sentimonsters.
 * Alya Césaire/Crimson Vixen - Marinette's geeky and superhero-obsessed best friend who is later revealed to be in leagues with Hawk Moth mainly so when Hawk Moth conquers Paris, she could become Paris' only hero. She was given the Fox Miraculous by Marinette to give her help when she needs, however, she is soon planning on using it to help Hawk Moth win when her cover is no longer necessary.
 * Lila Rossi - a more vicious and relentless bully who primarily bullies people because she thinks it is fun.
 * André Bourgeois - Chloé's cold and corrupt father who has most of Paris under his pocket.
 * Audrey Bourgeois - Chloé's cutthroat fashionista mother who hardly visits her and André yet is completely cold to both.
 * Bob Roth - a rude and abrasive record label head who often abuses his power.
 * Xavier-Yves Roth/XY - Bob's snobby and conceited son who is also a pop star and does many questionable things due to this.

Akumatized

 * Ivan Bruel/Stoneheart - the akumatized form of Ivan who became a Giant hulking monster after being accused of being someone that can harm people.
 * Nino Lahiffe/Vengeance - the akumatized form of Nino who became a vengeful spirit after being racially bullied.
 * Sabrina Raincomprix/Buddy - the akumatized form of Sabrina who became Chloé's "guardian angel" after being pushed away for being useless.
 * Alix Kubdel/Leech - the akumatized form of Alix who after frustrations of both hiding her sexuality and having her legacy handed to her, is capable to leach energy from people.
 * André Bourgeois/Hypnotizer - the akumatized form of André who after having his corruption almost exposed, becomes a villain capable of controlling minds.
 * Alya Césaire/Mirrorbug - the akumatized form of Alya who after being pushed away by Ladybug, becomes a dark clone of her.
 * Lt. Roger Raincomprix/Rogercop - the akumatized form of Roger who after refusing to accept a bribe from André as he becomes obsessed with creating law and order.
 * Luka Couffaine/Silencer - the akumatized form of Luka who was formed after being bullied for his love of his guitar who can steal voices.
 * Kagami Tsurugi/Hack - the akumatized form of Kagami who becomes vengeful hungry and out to kill those she finds that wronged her.
 * Gabriel Agreste/Collector - the akumatized form of Gabriel which was made primarily to throw people off from suspecting he is Hawk Moth.
 * Clara Nightingale/Screecher - the akumatized form of Clara who becomes vengeful against Bob Roth and can give a massive scream.
 * Lila Rossi/Mistress Nature - the akumatized form of Lila who can control nature in however way she can.

Issues

 * 1) /Stoneheart/ - Marinette and Adrien are entrusted with Miraculouses as they have to stop their classmate, Ivan Bruel, who got akumatized into becoming a rampaging stone monster.
 * 2) /Vengeance/ - After being picked on for being black, Nino gets akumatized into becoming a vengeance hungry villain as Ladybug and Cat Noir must convince him to stop it.
 * 3) /Buddy/ - After being pushed away from Chloé, Sabrina gets akumatized into becoming a villain who wants to protect Chloé no matter what as Ladybug and Cat Noir have to turn her back.
 * 4) /Leech/ - After feeling a lot of stress lately, Alix gets akumatized into becoming an energy sucking villainess as Ladybug and Cat Noir must break her free.
 * 5) /Hypnotizer/ - André is close to having his corruption being exposed as Hawk Moth akumatizes him to make anyone do what he says as Ladybug and Cat Noir have to stop him.
 * 6) /Mirrorbug/ - Feeling envious of Ladybug, Alya gets akumatized by Hawk Moth into being a mirror Ladybug as she and cat noir must stop Alya.
 * 7) /Rogercop/ - After he refuses to accept a bribe from André, Roger Raincrompx gets akumatized into becoming a law obsessed villain as Ladybug and Cat Noir must stop him. Meanwhile, Alya willingly visits Hawk Moth with a proposition.
 * 8) /Silencer/ - After being bullied by Lila and Chloé for his guitar, Luka gets akumatized into a voice stealing villain as Ladybug and Cat Noir must stop him.
 * 9) /Hack/ - After feeling pressure from her mother and the rest of Paris, Kagami gets akumatized into becoming a vengeful villainess as Ladybug and Cat Noir must stop her.
 * 10) /Collector/ - To throw people off his trail, Gabriel akumatizes himself into a villain who collects people as Adrien has to face off against his "corrupted" father.
 * 11) /Screamer/ - After being abused by Bob Roth, Clara becomes a villainess with a massive shriek as she heads to kill Roth as Ladybug and Cat Noir must stop her.
 * 12) /Mistress Nature/ - Lila, just wanting to cause mayhem, willingly gets akumatized into becoming a nature controlling villainess as Ladybug and Cat Noir have to stop her.
 * TBD
 * TBD
 * TBD
 * TBD
 * TBD
 * TBD

Differences

 * The series shifts from the light-hearted premise of the original series to one more akin to darker projects, dealing with themes like gun violence, drug use, sexual themes and racial discrimination, aside from the use of gore and the characters often resorting to strong language.
 * Paris is notably grittier and more akin to real life, filled with problems like corruption in both politics and the police, high crime rates, terrorism, drug abuse, racism/xenophobia, homeless people, sexual themes like infedelity, prostitution and sexual abuse and gender themes like sexism and LGBT discrimination.
 * Marinette secretly smokes due to the stress caused by being a hero.
 * Adrien is far more cynical, being similar to what he was initially planned to be, although he slowly warms up to Marinette, becoming close to what he is in the actual series.
 * Marinette has a strong dislike of Adrien due to his cold nature, yet she often flirts with Cat Noir while Adrien is clearly infatuated with her, even if his TBD creeps her out.
 * Alya is secretly working for Hawk Moth at the exchange of being Paris' only "hero".
 * Alix is a closeted lesbian.
 * André is notably corrupt.

Trivia

 * The author revealed that the idea for the series was due to Paris as depicted by the series not corresponding to Paris in real life as she finds the city as corrupt and twisted as American cities like Detroit, St. Louis, Baltimore and even New York City, Los Angeles and Washington, D.C. and she thought that it could be fun reimagining the series in a darker take inspired by Marvel Comics and DC Comics set in a more realistic Paris.
 * The series mixes adaptations of previous episodes and original stories.