Wait, are we talking about Akemi from 'Jujutsu Kaisen' and Mizu from 'Blue Eye Samurai'? Cause I've seen both pairings get tagged that way recently and it creates some confusion. Assuming it's the 'Blue Eye Samurai' characters, because that's where my brain goes. The best ones for emotional growth, for my money, aren't the ones where they just kiss and make up after episode five. They're the fics that really dig into the sheer damage both of them carry. Mizu's whole existence is built on a foundation of rage and vengeance, and Akemi's trapped in a gilded cage she's fighting to control. A story that treats their potential connection as a catalyst, not a cure, hits harder.
I keep coming back to this one on AO3 called 'The Weight of a Feather'. It's a post-canon thing where Akemi, now wielding real political power, tracks down a rumor about a lone samurai. They don't fall into each other's arms. Instead, it's this incredibly tense, slow dance of two people who fundamentally don't trust anyone, least of all someone who mirrors their own capacity for ruthlessness. The emotional growth comes from them slowly, painfully, learning to be vulnerable in ways that don't get them killed—Akemi letting someone see the calculation behind her smile, Mizu admitting that the path of revenge might have left her hollow. The author doesn't shy away from the fact that healing isn't linear; there are relapses into old patterns, moments of cruelty born of fear. That messy realism makes the small victories, like Mizu accepting a cup of tea without analyzing it for poison, feel huge.
Honestly, skip the fluffier 'domestic bliss' tags for this pairing. The real emotional journeys are in the 'angst with a hopeful ending' or 'character study' categories. Look for authors who treat their trauma with respect, not as a simple obstacle to be romanced away. A good sign is when the fic spends as much time on them rebuilding their individual selves as it does on the 'ship' dynamics.