Kaeya X Dainsleif Novels & Stories

Honestly I kinda bounce off most of them because they tend to default to a really simplistic 'sun vs moon' thing. It's all about Kaeya's deception and Dain's truth, the charming liar versus the cursed purist. I think that misses the richer soil. I'm way more interested in the idea of two people who've both constructed identities around colossal, world-shaping secrets, but one chose infiltration and the other chose exile. The dynamic isn't just opposition; it's a mirror held up at a weird angle.

I read this one fic where Kaeya figured out Dainsleif's connection to the Traveler's sibling not through heroics, but through recognizing the bureaucratic evasion patterns in his stories—the same kind he uses to deflect about Khaenri'ah. That felt real. Their conversations should feel like two spies from rival agencies meeting in a neutral city, every pleasantry a probe. The tragedy isn't that they're enemies; it's that they're probably the only two people alive who could truly get it, and they can't afford to.

Anybody else feel like the 'your worst enemy is your soulmate' premise gets recycled so much with these two it's basically the canon lore? It's practically unavoidable because the game practically hands it to us with a bow on it—Khaenri'ah, the curse, the shared history they don't fully remember. It's less a trope and more the foundational bedrock. Writers get a lot of mileage out of Dainsleif's eternal wanderer status contrasted with Kaeya's established, anchored (if deceptive) life in Mondstadt. That juxtaposition is pure fuel: the guy who can't stay versus the guy who won't leave, both hiding massive secrets.

That dynamic naturally bleeds into the 'mutual pining across centuries' or 'reunion after 500 years' fics. The angst potential is off the charts, often layered with heavy duty amnesia or memory loss subplots. You'll see a lot of 'touch-starved Dainsleif' because of his curse, paired with Kaeya's performative, flirtatious touch as a form of emotional deflection. It creates this really specific tension where every casual brush of hands feels loaded with five centuries of unspoken history.

Honestly, sometimes I skip the super plot-heavy stuff and just look for the quiet, character-study pieces that explore their mirrored coping mechanisms—the sarcasm, the deflection, the loneliness dressed up as independence. Those hurt the most in the best way.

Found myself thinking about this last night, scrolling through that tag. The tension they never got to resolve in-game is a huge draw, obviously. A lot of stories lean into the 'two sides of a coin' thing—Kaeya’s playful deceptions versus Dainsleif’s weary, brutal honesty. They’re both carrying the weight of a fallen kingdom, but their coping mechanisms are complete opposites. That contrast fuels a ton of angst and slow-burn mutual prying-open-of-armor.

You see a lot of 'what could have been' AUs, where Khaenri’ah never fell and they’re navigating some royal court intrigue together. But the more common, canon-divergent ones focus on the moment of truth—Kaeya finally revealing his heritage to someone who already knows, and Dainsleif being the one person who can’t judge him for it because he’s just as guilty. The dynamic isn’t about redemption so much as finding a mirror in each other’s ruin.

A surprising number of fics use poison or alchemy metaphors. The corruption, the curse, the thing eating them from the inside—it becomes this shared, intimate sickness they manage together, which is pretty bleak but also weirdly tender.