Sorry you haven’t been feeling well. I hope you feel better.
I’d be happy to inquire about your headcanons. Although, this question isnt so much about a “headcanon” as it is “compatibility”.
What characters would you say make a good match for Frost? Obviously, you enjoy Frit and Frabba (as do I) and sorta see Friest (in a one-sided sense). But I’m curious if you view any other characters as compatible ships for Frost? Or maybe just interesting in general.
Whether a pair would be "best" for him is somewhat of a interesting dilemma. My current Frost ships do have their own layer of drama.
I imagine that Frost and Cabba's relationship was rather prominent during the whole con, maybe not official or even confessed, but the sparks were there as a developing crush on a comrade in arms, for both sides. Obviously, the reveal complicates things and, while Frost's feelings were genuine, it would be hard for Cabba to think that their relationship wasn't part of the ruse as well. Even if the reveal never happened and Frabba proceeds blissfully idyllic from the outside, there's that nagging notion that Frost can never be 100% honest with his partner. If anyone were to discover his true colors in any other circumstance, it would be Cabba, whether due to a slip of the tongue when his guard's down or the Saiyan witnessing something he shouldn't. Cabba is manipulated into staying hush-hush, but those familiar with the pair don't know why they're suddenly so cagey around each other.
When it comes to the bounty on his head, Frost is not simply one to lie down and take it and fights against Hit after a quick ruse to attempt to catch him off guard. Once he confirms that Hit does not have the contract in hand is when he starts returning to his regular self, sassy and teasing. If Hit's not here to kill him, he feels more inclined to screw around with and poke the bear. The relationship is a delicate balance and Frost lets himself unknowingly grow attached despite the fact that the threat of the assassin's call to duty hangs in the air like a precariously swinging sword. Hit seems to find Frost at least somewhat entertaining, perhaps to the point where he'd buy the contract himself to keep Frost alive on his terms. Their manga counterparts could have a similar dynamic with less of the knife-to-the-throat in the background, but since Frost has more of Frieza's conqueror's pride, I imagine he'd be stubbornly trying to bag this all powerful assassin, one that's quite the looker at that, to earn himself "points" that no one's actually tallying.
Friest is one-sided to me, with Frieza taking advantage of his touch-starved counterpart. Frieza is cunning enough to keep Frost absolutely loyal- Frost wants to believe it's true and, pretty much anytime there's a strong doubt, Frieza is able to spin things back in his favor. The lingering unease keeps returning and, if not for the ruse pulled with Gohan, betrayal might have still been in the back of Frost's mind. If not for touch starvation, the two lizards would absolutely be full-on territorial. The fact that Frost is not this way from the get-go clues Frieza in that this one can be strung along easily.
In terms of other ships, I don't really have any that come to mind that aren't just aesthetic-matches, but if anyone has some other Frost ships I haven't considered, let me know.