I like the idea so go for it, and the howl wasn't a howl that was meat to effect, but you can make it a reason. But when comes to is stronger I don't really know about your vampire, because her father is a vampire king the leader, while my character is the alpha of the werewolves, and he was able to seriously wound her father. So if she is stronger than her father then she is for sure stronger than my character. If not then she is as strong as him