They will have to accompany her, because Valery did not want to fight that would be too boring. Even if she is going to take care of them they have to be useful in some way, if she takes care of them like a mother they will become useless and she won't have the courage to take care of them.
Valery already broke through the walls of most of the vampires, even at the time he did it the walls of those vampires were in the best possible conditions. If his people couldn't penetrate their walls with a little help from him then it wasn't worth taking care of them and protecting them.
Valery wants to conquer, to take the lands he sees as his, to conquer the lives of others, those who resist will only be exterminated on his word.
In this life he wants to see if his conquest can go beyond this planet. Where she can meet other races, other beings who have achieved divinity like her.
