I suppose? It's not really like that, their personalities have merged rather than one being dominant over the other. Parvati is quite kind to most everyone, though. As for Kama...

[How do you tell a kid that his cousin became a vessel for a Beast of Lust to attempt to end the concept of love throughout the entire universe?]

Well, she mostly only causes trouble for other people. She tends to just leave when things become too troublesome for her personally.