I’m gonna be real, the dynamic between them is less about rivalry and more about parallel growth, which is why I end up re-reading so many fics. They’re both prodigies shaped by intense parental pressure, but the way that pressure manifested is a world apart. Shouto’s trauma is icy and isolating, a legacy forced upon him. Katsuki’s is fiery and performance-driven, a pedestal he climbed himself. So when a fic nails it, their interactions aren’t just trading insults; it’s two people who recognize the same flavor of damage in each other but have completely different dictionaries for it.
That recognition is where the friendship potential really hums. I’ve seen incredible post-canon stories where they’re pro heroes coordinating raids, and the trust is brutal but absolute—no sweet talk, just a grunted ‘cover my six’ and knowing it’ll happen. The rivalry never fully dissolves, and it shouldn’t. It morphs into this relentless drive to outdo the other, not for glory anymore, but because pushing each other is the only way to reach heights they can’t alone. The best ones show them learning each other’s unspoken language: Bakugou understanding Todoroki’s silences, Todoroki reading Bakugou’s explosive bluster as the concern it sometimes is. It’s a bond built on actions, not words, which feels true to both of them.
Honestly, I get bored with fics that just rehash the sports festival forever. The interesting stuff happens after they’ve grudgingly admitted the other is strong. Exploring how two people so bad at conventional emotional communication somehow make it work—through sparring, through sitting in quiet companionship after a tough mission, through buying each other specific brand of spicy soba or protein powder—that’s the good stuff. It’s a friendship that looks like hostility to an outsider, and writing that subtle shift from genuine antagonism to competitive loyalty is a tightrope walk a lot of authors manage beautifully.