Several people in my fandom (Keeper of the Lost Cities) have lectured me for saying SoKeefe would be better as siblings, but the thing is, their bond feels familiar to me. Familiar as in... me and my older sister.
She's protective and chaotic, I'm anxious and chaotic. I pull my eyelashes all the time. The jokes, nicknames, teasing, and emotional bond feels like me and my older sister.
I could see these two staying up late together baking or listening to human music, but in the same way me and my sister do, with swing dancing and "how do you not know how to activate yeast?" convos and "the garlic turned green" laughter and one of them hiding to not get caught staying up so late.
I could TOTALLY see him tutoring her, but in the way that my older sister taught me math. With games and races and 'this will help you when you get to this level' lectures.
I also think Cassius acts like her dad, but that's a separate rant.