Is it me or is it kinda gross feeling how the blonde knight goes from not liking the demon lord to apparently having feelings for him simply because dude would not stop pestering her? Like in what reality does that actually work? This one apparently I guess.
Putting aside that sometimes simply talking and being in someone's life is, you know, a good thing that can lead to a healthy relationship...
She only didn't like him because he was the enemy. It didn't take long for her to drop that stance. Ghozal has gone out of his way to help her multiple times, actually saved her life on multiple occasions and also generally treated her like a lady.
If that isn't enough then what? Someone else here called it gaslighting her. I'd sure like to see what exactly he's supposed to do otherwise. Get on his knees and lick her feet, talk about his feelings, spend money on her?
He's still the former Demon Lord and he was pretty chill to begin with. Just because he does all this with a straight face and without chicanery doesn't mean his actions are any less genuine. Actually I can't believe I'm ironically pointing that out, it would be the exact opposite actions that would cast doubt on him.