3, 14, 19 for Balthazar/Tristian for the OTP ask game :)

3. Do they wear each other’s clothes? (sweatshirt, bandana, necklace, etc.)

Not much, really. In a practical sense, it would be difficult. Balthazar’s a bit smaller and a lot more slight than Tristian, so Tristian borrowing clothes wouldn’t exactly be comfortable. And Balthazar has some terribly awkward wings by the time the two of them are together- his clothes have to be tailored to him to accommodate the wings, and it’s difficult to wear clothes that haven’t been altered. Although it doesn’t stop him from occasionally stealing Tristian’s cloak or robe just in the spirit of mischief (and slowing down the process of getting dressed).

Not clothing per se, but Balthazar enjoys using his own brooches to fasten Tristian’s cloak whenever he helps Tristian get dressed- something to serve as a subtle touch of connection even when they’re apart. Tristian always waits until they’re apart to check what he’s been given. It’s a pleasant ritual to discover it, and it’s a point of comfort to reach for over the course of the day. He always returns Balthazar’s things very carefully at the end of the day.

14. How do their personalities complement each other? How do they clash?

The ways they clash are probably more obvious. Tristian is earnest to a fault and a person with very strong moral principles that he lives by (theoretically), while Balthazar is an ambitious person who often gets what he wants through deceit and trickery. There's a lot of natural tension between them- for a long time after meeting they really didn't like each other at all. Balthazar was quick to write Tristian off as dull and uptight, while Tristian rankled at the callous disregard Balthazar had for others. Tristian is also someone who clings a lot to an ideal of celestial virtue that Balthazar has spent most of his life trying to get away from. Even though the initial hostility faded there's still always some degree of friction. It can seem that Balthazar is too careless or too cold, or that Tristian demands too much without compromise. Always some arguments in there.

As for complementing... really, some of the clashes can be ways they cover each other's weaknesses at times. Neither cold pragmatism nor strong optimism can solve every problem- there's a sort of balance there, in a way. Or at the least a way to keep Balthazar's Machiavellian tendencies in check. And also I guess I'd like to think that their positive traits can influence one another as well- Tristian being a bit more flexible and better able to see nuance in a situation, and Balthazar becoming more open and trusting. Maybe this doesn't really count as a "complementary" thing but also like... the ability to be very earnest with one another. Balthazar is someone who doesn't let his guard down easily, but over time he begins to trust Tristian to understand his experiences without condescending to him about them. While Tristian isn't as obviously closed off as Balthazar is, he still doesn't put himself out there easily and feels a lot of shame confronting things about himself. Balthazar doesn't judge Tristian for any of his choices. He has a lot of empathy for the situation that makes beginning to sort through it easier. (And Balthazar does sincerely love Tristian's flaws, even if Tristian doesn't)

19. How do they feel about PDA?

Not at all self-conscious, that’s for sure. There aren’t a lot of big, dramatic gestures, but certainly there are plenty of small, intimate ones: entwining fingers, leaning into one another, gently brushing hair away from the face, a soft kiss pressed to the hand… It’s about the reassurance of knowing the other is present. It’s also the case that Balthazar is a bit clingy (something that surprises him) and Tristian is somewhat touch starved so…

It's embarrassing to watch, really.