Well seeing what the comments are like, i think i'll be the odd one out and say my opinions on them.
frida x hilda: no i don't approve of this (not because i am against any lgbtq pairings) it is just that they are kids and the conversations that they just have this more like best friend feel to them then anything more really.
Hilda x david: again this just comes off as a FRIENDship than a RELATIONship.
Frida x david: just childhood friends, nothing more, nothing less.
Hilda x trevor: umm pretty sure these 2 hate each and just that.