Sorry if this is a disappointing answer, but not in the slightest.

Griffith/Charlotte is a complete sham from Griffith’s side, he’s just using her to become king. His seduction of her was completely calculated, except when he was distraught after Guts left, and the way his dream and Charlotte are conjoined and presented in opposition to his feelings for Guts makes his relationship with Charlotte read as a very strong symbol of unhealthy emotional repression imo.

Also Charlotte’s obsession is so intense it seems very unhealthy, like, embroidering Griffith’s face over and over for two years is a little much lol. We don’t get much of Charlotte’s side of it but what we do get is basically a naive girl totally taken in by Griffith’s fake seduction, and it’s kind of sad to me.

As for Guts and Casca, to me their relationship reads 100% as both of them redirecting their feelings for Griffith to each other. There are very strong parallels to both their relationships with him during the scene where they hook up, they both acknowledge that they’re not over Griffith afterwards, and after the Eclipse Casca basically functions as an outlet for Guts’ feelings about Griffith.

Casca’s issues with her lack of independent identity – becoming Griffith’s sword after Griffith saves her, then becoming Guts’ sword after she sleeps with him – are not a good start to any relationship, and the licking wounds description seems very apt. It was never a grand, epic romance, but it’s not even a particularly happy or healthy hook up. They fuck right after Guts lets Casca stab him while thinking about how abandoning Griffith was maybe a bad idea, and right after Casca tries to kill herself. Then Guts has a flashback and strangles her during, and Casca is just happy to finally have someone receptive to her attempts to comfort and support them.

Afterwards Guts invites her along in as non-committal a way as possible, like ‘idk maybe you coming with me will suck and you’ll throw off my groove and i’ll end up ditching you anyway, but i want more sex so let’s give it a shot.’ Which I honestly find hilarious in how unromantic it is.

And even as a low-key licking wounds hook-up it feels very narratively forced to me (which makes sense since Miura said he had them get together just to make the Eclipse more dramatic).

Like Judeau has to practically shove Guts at Casca for him to even consider it lol.

Then of course after the Eclipse you have Guts abandoning her in a cave for two years, assaulting her twice, and redirecting his feelings for Griffith to her again – not even just in the hound scenes but also when he decides to save her directly because he compares abandoning her in a cave to abandoning Griffith in the snow, and when he decides to stick with her only after Griffith abandoned him lol.

Plus Casca is terrified of him for good reason, and the idea of their relationship turning romantic again after Casca gets her mind back is something I find fairly horrifying after how he treated her.

She’s been reduced to nothing more than a symbol of Guts trying to keep his hold on humanity, she’s suffered for it, and if she gets her mind back and gets back together with Guts as a narrative “reward” to him for suffering through a shitty life, like I think a lot of Berserk fans want, I would be extremely disappointed.

(I have a very, very long post that goes into detail on Guts and Casca’s relationship and how it largely revolves around Griffith here, if you’re interested, but I’d only recommend reading it if you’re not a fan of their romance. it’s also about griffguts and gay subtext but so is most of my blog content lol)