Lukadrien

Lukadrien is the slash ship between Adrien Agreste and Luka Couffaine from the Miraculous Ladybug fandom.

Canon
Adrien and Luka don't know each other very well, but when Adrien, as himself and not as Cat Noir, first meets Luka during the music festival in "Captain Hardrock", he welcomes him into the band. Where he uses his piano playing skills to serve as Kitty Section's guest keyboard player. As Adrien and Luka play, they glance back at each other, with a smile.

In "Party Crasher", Luka attends the Boys only Party that Nino and a few of his friends put together for Adrien, where he plays his guitar with a few of their other musician guests. When the title villain attacks, crashes the party and captures Ladybug, Luka as Viperion helps Cat Noir take on Party Crasher as one of his backup allies, with Pegase and Carapace. After the battle ended Luka helps Adrien and his friends to clear up his room.

Season 2
Captain Hardrock
 * The end card shows Adrien and Luka looking at each other, with a smile.

Season 3
Party Crasher
 * Cat Noir is happy to see Viperion as one of his backup allies, who gives the Cat-themed superhero a smile when he greeted him.

Fanon
The ship is believed to have began in "Captain Hardrock" when Luka welcomed Adrien to his band, as a guest member for the music festival, and the popularity of Lukadrien continued to grow after their paths crossed at the ice rink in "Frozer", where the two show no ill will towards each other when it came to Marinette, along with Cat Noir helping a deakumatized Luka to expose Bob Roth's crime of stealing Kitty Section's idea for XY's new song in "Silencer"; which is why fans have Lukadrien rival with the het ship Adrienette. Along with Lukanette (Luka x Marinette) and the alternate love interest ship, Lukagami (Luka x Kagami).

When it comes to Adrienette or Lukadrinette, however, some have Adrien view Luka as a love rival for Marinette's affections, once he begins to develop feelings for her alone, consciously or unconsciously. As there have been sighs of Adrien possibly being jealous of Luka or slowly realizing his feelings for Marinette, from when he first saw them together at the rink. The same with their alter ego selves, since Marinette has develop a crush on Luka and a few fans believe in the possible chances of Cat Noir becoming jealous of Viperion (or Luka) for when it comes to Ladybug's affections.

Fandom
FAN FICTION
 * Adrien/Luka on FanFiction.Net
 * Adrien/Luka on FanFiction.Net

DEVIANTART

TUMBLR

WIKIS
 * on the

Trivia

 * According to Feri González, Luka isn't limited to the role of alternate love interest, the same with Kagami Tsurugi.
 * They are both Jagged Stone fans.
 * The out of order released episode "Party Crasher" reveals that sometime before the events of it, Luka will become one of Ladybug and Cat Noir's occasionally allies whenever he is given the Snake Miraculous so he could help them as the snake-themed superhero, Viperion.
 * Even though fans knew for sometime that Luka would one day receive the Snake Miraculous, as well as Adrien using the said Miraculous on himself (with and without its power merging itself with the Cat Miraculous) in the future, from concept art leaks that reveal Adrien and Luka's snake-themed superhero titles, forms and weapon; which is how a few thinking ahead fans were able to come up with a few Viperion ship titles for the ML fandom.

Variations

 * Lukadrinette refers to the ship between Luka, Adrien and Marinette