LynLumi

LynLumi is the het ship between Lyney and Lumine from the Genshin Impact fandom.

Chapter IV: Act I
Lyney and Lumine first meet in Fontaine, during Fontaine's archon quest. While the traveler and Paimon check on his twin sister Lynette, he appears and introduces himself as Lyney. Paimon then explains that Lynette was talking to them, which surprised Lyney as he is aware of her tendency to remain to herself. When Paimon asks about what Lynette had said, Lyney responds by explaining that there is a prophecy being spread around Fontaine. He then formally greets the pair by shaking hands with Lumine and patting Paimon on the back. After learning the reason for their visit, Lyney offers to take them to the Opera house but is interrupted by the Hydro Archon, who also welcomes the two unfamiliar travelers. Later, Lyney helps the travelers avoid arest from the Hydro Archon Furina herself.

Fanon
Although the ship started receiving fanart and fanfiction already on the day Fontaine and Lyney got released, the ship seems to be quite unpopular. The main popularity of it seems to come from Lyney's flirtatious personality.

There are currently 30+ written works on AO3.