What are Kuro and Rosie parents style like do they spoils there babies?
Rosie tries to emulate her own parents, who were rather strict and expected a lot from her. She knows that Kuro has very little morals so she sees herself as having to pick up the slack in that department. If she isn't maintaining the household she's scolding one of her daughters for doing something heinous.
She's also the girls' teacher in an educational sense and has had to find ways to get them all on the same page. For example, Aiko isn't interested unless it's related to love and/or people. Akane tries her best because Kuro asked her to work hard, but she has a short fuse. Hanabi sleeps through class. Kanna is smart but sometimes finds it hard to focus with her sisters' distractions. Keane and Sakura are like perpetual grade schoolers even though they're on the same subjects as their sisters.
Rosie's much more open to the idea of somehow introducing the girls into the world than Kuro. She definitely thinks that Kanna should be able to go to a normal school because she's already exhausted all the material that Rosie is comfortable teaching.
Kuro spoils the girls as best as he can, because he's trying to make sure they don't want to leave the comfort of his den. He spends most of his time at home trying to dote on them.
He also tries to make up for what he sees as his failures. For example, he's a little more lenient with Aiko not because she's the oldest but because he feels like he corrupted her and is trying to give her as much space as he can so he doesn't make another mistake.
There are times when he feels he has to be very strict, especially when it comes to his One Rule of "Never go beyond our territory Ever." He scolded Akane so hard when she was little that it changed her entire personality, so it's not like he's unable to be firm...he's just a man of extremes.
They have an odd balance as a parental team. Kuro's word tends to be final, but he has a few weaknesses and most of them are Rosie's specialties. They do love each other and can even get a little Gomez-and-Morticia-esque, but there's something unsettling about the way they interact occasionally. The kids are often conflicted about how to interpret their parents' behavior.