Cash and Sascha were briefly in a shitty punk band together when Cash was in the Scorpions. They only ever played two shows and didn’t really talk much, bc Sascha hardly talks to anyone and Cash was Going Thru It in those days, so they don’t really know each other, but they are pleasantly surprised to see each other when Coco introduces Cash to her siblings. He played the drums and she played bass(and harmonica on a few songs). The music was not good. They fish out an old CD and Calli is the only one who has it in them to humor it.
-Calli still has trouble concentrating on academic work if Coco’s not around. She associates study time with Coco’s singing while doing housework, from their childhood/teenagerhood. she’ll sometimes listen to old recordings of her singing if she’s not around and Calli can’t focus on her work.
-Sascha and Coco are both little feral goblins who are always ready to throw down at any given moment, so they constantly start fights in the house that cause a huge mess. Sometimes Calli gets included in the battle, but only if both of them know she’s ready for it, and if it’s not over a personal matter. in the Nova household, you’re always battle-ready.
-Calli plays pranks on both of them. She likes to scare Coco when she’s not expecting it, although she usually also has to dodge an instinctive punch, since Coco is fight in the fight-or-flight argument. With Sascha, her favorite prank is putting her barrier magic in a doorway he’s about to walk through. He never doesn’t fall for it. He has not learned in a decade, and honestly bless his heart for that.
-Coco and Sascha always end up butting heads when they have guests over, bc she was always taught in her upbringing that Guests are The Most Important Thing Ever™️(it’s a big thing in her culture since, being on a hidden-away island, people didn’t often have guests), and Sascha is apathetic at best with other people in the house. He pretty much behaves the same way he always does, which is relaxed, non-talkative, and casual. She, meanwhile, is extra respectful, and always offering things like water and food and the like. She gets mad at him for not being more reverent about the whole thing.
-Despite all their fighting, both physically and otherwise, Coco and Sascha are very close. Sascha is the first one to notice that something’s really wrong with Coco after her and Aten split up, and actually comfort her for it instead of just staying out of her way like most everyone else. Much like Calli, Coco didn’t tell Sascha about any of their relationship(under Aten’s advice, of course), but he knew she needed her big brother and went to help her.
-and of course, Calli and Sascha are incredibly close. he was the one to help her after she and Coco were separated, he helped her learn how to fight in ways that Coco couldn’t teach her, and he’s usually who she goes to when Coco’s being unreasonable. they all tend to end up being mediators between each other, bc between the three of them, there’s a fuckton of trauma. They do love each other very much though, and even though Sascha isn’t related to Calli and Coco by blood, they both consider him just as much of family as each other.
-in some universes where it’d make more sense for there to be an actual adult in the house, Astrid, who’s the one remaining Village Elder in Andromede(Coco and Calli’s ancestral homeland) adopts all three. It’s usually Calli and Sascha at first, with Coco finding her way in eventually. despite the fact that she’s not super hands-on, she cares dearly for all three of them, and is always willing to help then with whatever they need. Also, they call her "Grandma", not "Mom," even though she's technically their adoptive mother.
