They're enemies...but also frenemies, sorta. I think Harry wants to hate her, but can't quite, she'd like to corrupt him, but is glad when he refuses. It's a mess.
Sounds like the beginning of a totally dysfunctional romance.
Yeah, it does, doesn't it? For what it's worth, I think Harry and Lara
are attracted to each other simply as man and woman, which of course they are. The trouble, of course, is that they aren't just that. Harry is a Wizard of the White Council, a Warden, THE Warden, and a hero in spite of himself. Lara is a monster who eats people, as well as being a calculating political killer and a ruthless manipulator and seriously twisted, even allowing for being a White Vampire.
They're natural enemies...but alike enough to be attracted. They're both born snarkers, they both are way above average intelligence, both are 'damaged' in ways that overlap. It would be hard for the human Lara and the human Harry not to be attracted. But they're still enemies, too.