Trollge GF uses BF's weakness to flirts and compliments to her advantage and uses BF's longing for love and affection as a way to manipulate him into becoming a Trollge Entity like her and the others. But BF doesn't know this yet.

And no, this isn't just because I wanted to do this for her for no reason; she ONLY does this to BF, no one else. But hey, at least I have pretty valid reasons as to WHY she still flirts with BF even after being turned into a Trollge Entity and it's not just "She's a villain. LET'S MAKE HER TRY AND SEDUCE ALL OF THE MALE HEROS FOR NO REASON!!!!!" I like to connect things and make things make sense in a way.

Which also ties into BF and Trollge GF's cracked heart necklaces, BF believes that Trollge GF still loves him even though she's a Trollge Entity. While Trollge GF doesn't actually love him anymore, kinda like giving BF false hope in a way.

(And by "BF" I mean my son.)