Mirio after he clowned on 1A so hilariously and seemingly effortlessly, but we learned there was so much more than that going ofc.
His wholesome, encouraging, supportive, big brother energy and being protective of Eri and giving her a much better life. He and Deku were amazing in that arc and in regards to her as a whole too.
Also fighting Chisaki after losing his quirk and Sir Nighteye and not giving up.
Gentle for being so gentlemanly funnily enough but hilariously and unexpectedly badass and dangerous too. Really memorable character in such a short time. Relatable backstory too IIRC?
Kirishima for being such a noble, brave, selfless and reckless, truly heroic legend and gigachad. Amazing fight with Fatgum vs Rappa too.
Nagant for being such a relatable, tragic, nuanced badass with a painful bur understandable backstory, motivations and personality. Awesome quirk too.
Star and Stripe for being a truly strong, heroic badass and achieving the world's strongest woman and no 1 USA hero and giving us an amazing fight vs Shigaraki except for the ending imo. Oda could learn a lot from Hori.
Twice for being a truly tragic, Relatable, funny, iconic, unforgettable legend who accomplished so much and tried his very best to the end. A real one to the end. Truly sincere guy.
I could nominate Ms Joke, Aizawa, Mt Lady, Endeavour, Hawks, Gang Orca, Eri, Shoto, Deku, Jeanist, Toga, Present Mic, Shirakumo, Kaminari, the girls of 1A and such for various reasons too.