hiiiii!!! happy new years anon! my favorite uma pairs are mayabura, any older sapphic x mayano actually, opefuji, dotope, shakafai and urarice. my favorite uma butch by FARRRR is opera thats my boyfriend!! i also like fuji, vodka and riko a lot. teio makes a pretty cute baby butch too. i do have to say i think i need to learn more about a lot of the other butches in the franchise since i mostly consume umamusume via the global gacha lol im addicted to it... but i feel drawn to seiun sky, narita taishin (havent pulled these two yet </3), stay gold, nakayama festa, air shakur and sirius symboli who seem like they could be varying degrees of butch hehe. thank you so much for asking!