That's hard, I have so many that I absolutely adore... rather than copying basically the list from my Best Girl™ response I think I'll just go with a toss up between Emelia (Re:Zero), Ryuko Matoi (Kill la Kill), and Tali Zora vas Normandy (Mass Effect)! Honorary mention to Sora (Kingdom Hearts) for being a very formative part of my early years and one of the only male characters I can think of atm that isn't, like, a gacha character lol.