Jeanluc

Jeanluc is the het ship between Jean Gunnhildr and Diluc Ragnvindr from the Genshin Impact fandom.

Canon
Diluc is a former Knight of Favonius, during his time as a knight he was Jean's senior. Due to Diluc leaving the Knights of Favonius as something occurred, it made him very critical, however Jean seems to understand why he's very critical of the knights. After Diluc left the knights, Jean refers him as 'sir', which Diluc tells her to not call him that but then proceeds to ignore it as he realizes the two don't work together as often anymore.

Archon Quest
In act II of the Mondstadt Chapter, after Venti and the Traveler went to the tavern when the tavern closes down since Venti and the Traveler unsuccessfully stole the Holy Lyre Der Himmel. When they went inside the tavern, the both of them sees Jean and Diluc beside each other, while Jean was surprised that the Traveler was the one who stole it, Diluc tried to make Venti play the song again although Jean believed the Traveler. Diluc was surprised by how Jean believed the Traveler since the Traveler was an outlander.

Jean mentions when she was younger she had a pet turtle. Paimon found it rather odd for Jean to have a pet turtle and asked Diluc if he found it odd at all. Diluc responded by telling Paimon he doesn't find it odd as he had a pet turtle when he was younger as well.

Leo Minor
In Jean's Story Quest, when Jean asked how did they find the time for the party that was being planned to her. Kaeya told her that the key organizer was Traveler, they also had Diluc to thank for the venue, otherwise they would be looking at quite an alarming bill right now. Diluc then says despite his initial reluctance to sponsor a Knights of Favonius event in any way. Him, like any other citizen of Mondstadt, owes Jean his gratitude for her hard work.

Webtoon canon
In the Genshin webtoon Chapter 6 - Wind and Fyre, Jean recognizes Diluc's father being the previous owner of a delusion mentioned in tattered research papers by the Fatui. She then sends Lisa to question Diluc about his involvement in the recent Black Fire incident. Diluc is surprised that Lisa knows about his father's death because it was supposed to be a secret, and then says that Jean must have told Lisa about it.

Quotes
"Trifling matters can become Jean's greatest enemy."

- Diluc about Jean

"Her unparalleled sense of responsibility is the sole reason why she still hasn't found her true calling."

- Diluc about Jean

"Master Diluc has his reasons for being so critical of the Knights of Favonius. I am not proud of the way things went, but I cannot change the past. All I can do is keep working hard, in the hope he may one day see us in a better light... This is my duty."

- Jean about Diluc

"Master Diluc is my senior, and I have the utmost respect for him. Though we have gone separate ways, I can sense we share the same strong commitment to protecting Mondstadt at all costs."

- Jean about Diluc

Fanon
Most fans joke that Klee, is Jean and Diluc's child, with Klee having red eyes and blonde hair. Meanwhile other fans ship Jeanluc because Jean called Diluc in the Japanese version "Senpai". Although it might been a misunderstanding since the word Senpai means Senior. Jeanluc currently rivals Jeanlisa and Kaeluc, which are the most popular ships for the two. The ship currently has more than two-hundred works on Archive of Our Own.

Fandom
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Trivia

 * Diluc and Jean appear together on the first Wanderlust Invocation banner (Version 1.0).
 * Jean likes to tease Diluc.
 * In an ad in which they are featured together, they both go to the Secret Heart Shaped Island and activate the mechanism for the luxurious chest by standing in the middle of the heart together.
 * Both Jean and Diluc owned tortoises as pets when they were children.
 * Both use Dvalin's Plumes for their talent ascension materials.
 * The book about Jean's ancestors, 'Biography of Gunnhildr' can be found inside Diluc's Dawn Winery mansion.
 * The swimsuit that Jean wore in the 1.6 update Midsummer Islands was a collaboration project in which the Knights of Favonius + Diluc helped create the outfit. Kaeya was the one who convinced Diluc to hire a tailor to tweak the design.
 * If you talk to Kaeya on the islands the night before the water forcefield on Klee's island is removed, Kaeya will mention to the traveler that part of the reason why he wanted to come to the Golden Apple Archipelago was because he was curious to see both the Acting Grand Master (Jean) and the former Cavalry Captain (Diluc) being in the same place.