Hina's role in that story is such a frustrating but effective catalyst. She's not some perfect guiding light—she's messy, she makes terrible decisions, and her affection for Natsuo is wrapped up in her own unresolved grief and loneliness. That's what makes her impact feel real, I think. She's the initial spark for his writing, the muse for his early work, but also the source of his most intense pain when she leaves. That push-pull, the cycle of inspiration and heartbreak, forces Natsuo to mature. He has to learn to separate his identity as a writer from his obsession with her, to find stories within himself rather than just writing about her. The whole journey is him grappling with the difference between a fantasy and a real, complicated relationship.
Honestly, sometimes I just wanted to shake him for being so hung up on her for so long, but looking back, that prolonged fixation is the point. His development isn't a clean upward curve; it's jagged, with regressions. Hina’s eventual return and the circumstances around it don't let him fall back into old patterns, but force him to make an active, adult choice about what kind of love and partnership he actually wants. Her influence ends up being less about 'saving' him and more about being the constant, painful mirror he has to look into to grow up.