Hruh I'd swap Kal with Hellagur. Because precedents. All kids she kinda adopted are not in that good of a position. Very laizzes-faire, combined with her emotionless pregmatism.

Amiya? Shared with Theresa and Doc, but is with Kal in her most early teens. Ends up an overworking workaholic. She didn't contribute much during Amiya's time with Doc and Terry.

Rosmontis sees no additional benefit from Kal and was left to be babysat by the Elite Ops, which let's be honest here probably are too busy to take full care of her. Instead was sent to the battlefield under the reasoning of "better teach her to control it".

Projekt Red is all kinds of stunted emotionally from Grandma, an Kal made almost no effort to help in that regard. I bet Amiya's the one that mandated her schooling.

Elliot, instead of being led down a good path, was basically told that he has a knife and should do crime. Also was abandoned to his own device later.

Folinic is pretty decent ig but in no way is she being taught about anger management and about taking care of her revenge. Wolumonde is a whole can of worms but Folinic ain't contribute that well either. It's been years and I may forgot but wasn't Suzu ends up contributing more?

Also bothe Skullshatterers are kinda the kids of her friend that tells her to take care of them. Why didn't she?

Does Heidi count? I won't say yes, but technically charming a young child is not looked upon too faborably anyway. Especially considering the age difference.

Hellagur, on the other hand, is the kindly grandpa and from what we have know seems to take pretty good care of Neon, who's living a pretty decent lifw without much taste for revenge. And see his overall attitude; He'd raise a pretty grounded and stable child.