I love having the physical versions of the Japanese Seiyaba books sm.
I get to see the situations certain characters use Kana vs Hiragana and how they usually use it.
Taka mainly uses Kana for exclaimations and when he is acting more sadistic to put a point on phrases made to harrass Yu.
Yu just straight up does it when he acts extra like an old rural man (like when he talks like one, I kinda imagine it like when my partner's country accent slips out lmao).
Rino uses it liberally, I assume cuz he's a city slicker and super hip with the lingo. He's meant to be really cool and young and free.
I need to beush up on my skills, but this has been a really good use for practice? So yay.