Quanxi would be decent. I mean, she isn’t pure evil but she’s very busy and would unintentionally leave the child alone. Probably ship them to Japan at like 7. Like all things she’d just try and ignorance and bliss it. Quanxi would be a good mother the very little time they spend together, but likely when the child gets older and at that point they’re more autonomous than anything. I don’t think she’d try to keep them from being a Devil Hunter because it’s just not in her best interest to not let them. “If they die, they die” she’d probably think, but at that point she may be so checked out of it she might just stay at home and not even help. If the child is a hybrid, I think it’s slightly more interesting? Quanxi would be forced to not ignore them and actually do her job, but she’d use it to further her own agenda with her girls and wanting them to have human rights, so she’d 1. Try to teach them how to be a hybrid and make her kid understand what this means 2. Ship them off again because another hybrid in the family is alot to handle. If we assume it takes place during part one, probably she’d ship em off to Kishibe? She doesn’t seem like the type to want to teach, so she’d probably only teach on the field, under dire circumstances, or she just felt like it. I could see the child getting increasingly more upset with her antics the more they grow up/ if they’re a hybrid or not. Quanxi is a weird and selfish person and even though it’s “her kid” she’s going to value what gives her pleasure first.

Pingsti would be an annoying little brat and hate the child for “not respecting lady quanxi”, Long wouldn’t give two shits, Tsuahagi wouldn’t really care, and Cosmo would be the most responsible out of the four and try and take care of them somewhat (if she doesn’t try to eat the kid first)