For some reason I find picturing Gamzee in a good Kismesisitude difficult.
When I try to think of pairing him up pitchways, it never goes anywhere because I hardly know where to start! Gamrezi happened in canon, but it was toxic beyond belief, and ended in a doomed timeline, yikes. I personally can't see GamDave (once again, in a healthy manner) because what could they possibly admire in one another and what would they argue about that wasn't just Dave shattering Gamzees with drawling mind with insensitive material?
Putting Gamzee in a pitch relationship seems to inherently imbalance it? When Terezi is weeping over how she and Gamzee got together, she mentions "TEREZI: 4ND H3 W4S SO MUCH N4ST13R TH4N H3 3V3R US3D TO B3! W4Y MOR3 TH4N 4NY OF OUR FR13NDS 3V3R W3R3 TEREZI: ON3 T1M3 H3 ST4RT3D MOCK1NG MY BL1NDN3SS TEREZI: WH1CH N3V3R BOTH3R3D M3 WH3N 4NYON3 3LS3 D1D 1T TEREZI: BUT SOM3HOW, TH3 STUFF H3 S41D...TEREZI: 1 L3T 1T G3T UND3R MY SK1N" My interpretation is that Gamzees status as a Bard Of Rage inspired uncharacteristic hatred in Terezi, essentially putting fake fuel into their kismesisitude.
When Terezi and Gamzee separate, Terezi stops being under the effect of Gamzees classpecting powers, allowing her to come to her senses about him, but then when they meet up again, Terezi starts feeling Rage towards him, clouding her sensible Mind and pulls her back again.
I formed 3 questions, if Gamzee realize his influence, whether or not his attraction to Terezi is real, and both of these equating to "is there actual character motivation or is this just Gamzee being written as evil and messed up?"
Looking at Gamzees conversation with Rose in the 3rd Openbound, he doesn't say much as to why he's with Terezi, only explaining their kismesisitude on her end and calling their relationship "the dark miracle called hatebliss.". Nothing he says points or hints at him knowingly doing anything to her, which could point to him being oblivious, or just Gamzee typical unreadability, I'm personally choosing the interpretation that he's oblivious.
During the [S] Act 6 Act 6 Intermission 5, we see Gamzee advancing on Terezi, visible Spades in his eyes, this immediately snuffs the idea that his end of their relationship was fake, we also see Terezi being visibly uncomfortable with it as well, pushing the Bard Influence Theory.
So, that means that there was genuine characterization happening there, rather than more Evil And Messed Up Gamzee writing.
Back to my opinion of "Putting Gamzee in a pitch relationship seems to inherently imbalance it?" His Bardly influence plays a part in it, he also seems more physically adept than the rest of our cast? (No I'm not going to use Equius as proof, that was on Equius choosing to die.)
I mean, take the Terezi beat down, sure she didn't fight back, but did you see how he was moving? He bashed her face in, back flipped her into a suplex before flipping AGAIN, on the top of her head might I add, into an INSANELY TALL flip, into the ATOMIC DOUBLE JUGGALO BACKBREAKER!!! Not to mention him swinging her over his head a few times after!
He took to bow kind like a duck to water, he snapped Nepetas arm with just his raw grip strength, he's a demon!
I don't know, man, I made the post and drew the art, have at it, I'm done thinking on this for now.