Aww, how sweet! Meanwhile, in my version, those two are basically siblings who always get into troubles (thanks to Scarlet's hyperactive behavior). Azure is the little sister, and Scarlet is the big bro. And my latest fanarts is basically how my Azure would looks like (and yes, she's a serious type of person, which is really OOC to how people would picture her)

Azure : I hate the fact that we're related, and I have to deal with his bulls***s everyday...

Scarlet : Cheer up sis! At least you got a big brother! (poses)

Azure : I really want to kill you now