Dainther

Dainther is the slash ship between Dainsleif and Aether from the Genshin Impact fandom.

Canon
Aether can be portraited as the Traveler nor the Abyss Prince, Dainsleif is often aware of Aether as they're enemies as the Abyss Prince. Though when Aether is the Traveler, there is a video called the Teyvat Chapter Storyline Preview, at the end of the video. While Dainsleif was narrating, he tells Aether; "Defeat me, command me to step aside, show me that you are worthier than I to rescue her.". So we can assume that Dainsleif has the knowing's of Lumine's appearance and where she is and has the ability to rescue her, this was later then confirmed through out the Bough Keeper: Dainsleif Quest, but it then came out that Lumine was enemies with Dainsleif. But there's still a chance.

Bough Keeper: Dainsleif
Starting on Aether being the Traveler. In Act 1 of Bough Keeper: Dainsleif, Aether meets Dainsleif at the Tavern, Aether introduces himself as from the Adventurers Guild, and as the Honorary Knight. Yet, Dainsleif didn't respond, until Aether tells that he's a Traveler. Into which, Dainsleif finally responded. Dainsleif questions Aether onto why he's traveling, Aether answers him that he's looking for his lost relative which is of course, Lumine. Dainsleif then offers Aether to sit with him, Dainsleif introduces himself and asks if he needs something from him, Aether tells him that he was inviting him to adventure with them.

Fanon
Dainther isn't that popular among the Genshin Impact fandom but, there is also a theory going around in the fandom that Dainsleif is Aether and Lumine's brother. Another theory is, Dainsleif is the future Aether due to their similar appearances that the two have. Dainther is often overshadowed by Xiaother and DainKae. Which are the two most popular ships. On Archive of Our Own, there are currently 20 fanfictions, depicting the two.

Fandom
FAN FICTION