The show loves Kai's progression because it's so loud—from a piano prodigy without a soul to finding his voice through loss. But I'm way more interested in Tsubaki's arc, honestly. It's quieter, but it guts me every time. She's the childhood friend, the one who knows him before the trauma, and she has to learn to love him as he becomes someone else entirely, someone she can't fix or protect. Her growth is about letting go of that fantasy and seeing him as a real, hurting person, not just her cute neighbor. That final scene where she tells him she loves him, knowing it changes nothing? That's brutal, mature growth.
Even Kousei's mom, Emi, gets a sliver of redemption, not as a person, but in Kousei's memory of her. He stops seeing her purely as a monster and starts to understand her own twisted love and fear. It's not forgiveness, exactly, but a complex integration of pain that allows him to move forward. Watari's journey is subtle too—the playboy facade cracks, and you see his genuine care for both Kaori and Kousei, even if he doesn't know how to navigate that emotional minefield.