JDJJDJD i think kisame would (highly ironically) probably flag as like a bootlicker and a narc given his… personal relationship… with…. “yagura”… to zabuza and co until he sent the worlds weirdest and funniest mixed message by assassinating the water daimyo and bailing. but zabuza still hates him. bastard.
NO BUT THATS IT EXACTLY! i love zabuza and kisame as friends or begrudging comrades in aus but in canon? from zabuza's perspective zabuza is the best of his nation, he desecrated the chunin exams of kiri at 9 years old and forced his way into the elite swordsmen group, he couldve been sitting pretty as a revered ninja or kirigakure but he knows there is something wrong with the authority of the country and immediately jumps to the idea of revolution. a revolution. thats so out of left field for a bloodthirsty soldier but thats how Fucked Up kiri is in his brain.
and then theres this guy, who arguably is stronger than him, and stronger than his other swordsmen, and hes in the cypher division killing "traitors" but hes also working directly with the swordsmen. and zabuza knows that this guy knows that theres something fucked up with kiri. but when zabuza tries to start the revolution they get intercepted and betrayed and by the power vested in me i will die thinking that kisame stood on the other side of that coup and drew out information for yagura so theyd be prepared to end that before it started. there is absolutely no way that zabuza ever looks back on his experience in kiri and the people who kept it a miserable, bloody place with anything less than vile hatred because zabuza wanted to make the nation better for kids like him and haku.
and then kisame kills fuguki out of state induced brainwashing and then immediately jumps ship to listen to anything that secret evil obito wearing the face of yagura says because why not join another life path of brain washing, this time with a world wide revolution.
zabuza died in shonen so that he couldnt jump on kisame's back and bite him like the piranha he wouldve become when seeing him in the streets