They're basically mirror images of each other

-Had a bad fall

-"Used" to be "great" (they still are great but they think they failed at the *one* thing)

-Prone to addiction (and likely to get over it quickly)

-Stubborn and difficult

-Sassy and overconfident

-She's the first human he dated, first human he kissed, first human he caught himself "caring about"

-on screen, their energy is way less toxic and dysfunctional than Asta and Harry

Unpopular opinion about Asta: I do feel like they're a bit toxic. I feel like Asta and Harry will outgrow one another. She wants him to need her but eventually he won't need her anymore. He helps her and protects her, but it winds up backfiring and causing friction. They're in too deep... but their basics (moods, communication) doesn't line up.

One thing that everyone misses during their favorite scene (when Asta calls Harry a 'friend',) is that... in the scene before that, D'arcy says to Asta "you get touchy-feely when you lie", and when she called Harry her friend, she was cuddling up against him; insinuating a lie, basically.

Dan also hints/urges her to be nice to him to save the human race and puts a lot of undue pressure on Asta. I'm sure Asta feels a bit resentful of all of this. Not to mention, in season 3, Dan hinted greatly at giving Asta a parenting do-over experience with Harry. He says something along the lines of, "You have us now and we weren't here to help you with Jay but we are here to help you with that alien." So, I feel like there's wholesome potential as a platonic mother-son thing, or platonic "orphaned siblings" thing, but not a mature relationship, and Asta needs boundaries and community to make it work.

But when he's with D'Arcy, they just frolick and joke. Their maturity levels are the same. The heaviness isn't there. They're open about their traumas with each other but they resolve it in healthy ways. D'Arcy doesn't act like a disappointed parent towards Harry like Asta does, and she builds off the 'clown' energy Harry has that Asta tends to roll her eyes at. They're also both troublemakers, and Asta is happy to be the "mom friend" to both of them.

They need to be a thing.