In terms of relationship and dynamics in Wind Breaker, my favs are:
- Kaji and Hiragi: At first it seems like just a senpai and kouhai relationship where Kaji respects Hiragi, but then we find out that they've been friends since they were kids, and that Hiragi didn't let Kaji see himself as a monster and instead gave him the headphones and sucker to help him keep calm, and how we're shown that unlike Sako, Kaji didn't care about Hiragi telling him to stop following him and just did when he wants which is following Hiragi to Furin, and how Hiragi got so pissed, not just cause Banjo beat up Kaji and the others, but because he made Kaji do the thing he hates most about himself. Just, I really like their relationship.
- Nirei and Suou: I really like the relationship they've developed here. The way that they've both become Sakura's best supporters, but also how they have their own dynamics. It's how Suou recognized that something was wrong with Nirei and how he felt comfortable enough to ask him to help him learn to fight and how Suou respects and takes him seriously but also recognizes his limits and started him off realistically. It's how Suou trusts him enough to fill in his gap when he needs to step away but still worries about him.
- Jo and Choji: I mean, that post about them being 'sunshine protector & sunshine' isn't wrong. Jo literally does a bunch of scummy shit solely cause he wants, in his words, for their 'sun', Choji, to shine again.