Oh, that's a deep cut. Their dynamic's more understated, so the really good stuff often comes from writers who lean into that. I'm a sucker for moments where Tsuyu's bluntness cuts through Tokoyami's dramatic gloom in a way that's gentle, not mocking. There's this one fic where they're stuck on a rainy rooftop during a training exercise, and she just starts listing facts about the local frogs she can hear, completely deadpan. He's trying to maintain his dark persona, but by the end he's asking questions about their mating calls. It wasn't a confession scene, just quiet character connection, and it felt incredibly real.
Another favorite is when fics explore their shared 'non-human' qualities as a point of understanding, not alienation. A story had Tokoyami helping her with a difficult rescue simulation involving water, and Dark Shadow's fear of it created this interesting parallel with Tsuyu's own vulnerabilities. The moment wasn't about overpowering the fear, but adapting around it together, using her aquatic skills and his shadow in a weirdly complementary way. Those practical, problem-solving scenes where their quirks and personalities mesh strategically often hit harder for me than the overtly romantic ones.