Sean does not, personally, believe in demons, although maybe after the way he got his magic powers he should probably start. It's weird seeing Jenna see him through that lens—and it's wonderful how she believes him, doesn't think he's evil, at least not yet, that she's willing to hear him out—and that she agrees with him about what happens to Dani, and that she understands him, understands the way he feels about her—
When she speaks, he listens, and he's so so glad she trusts him, and he's pretty sure she's about to stop.
He takes a deep breath and hugs her and kisses her forehead, and then lets go and sits back because he doesn't think she'll want to be touching him for this next part.
The thing is, he's not a good person. He is in fact by many definitions a very bad one.
(He remembers what it's like to hurt people, in brief but vivid flashes of lust and violence and power.)
And—he's trying something new, here, he's trying not hurting people, and (he remembers what they did together just a few minutes ago, how good it was) as far as he can tell it's better, and it's certainly more honest—he's ruthless enough to use mind control and memory editing to protect himself or to make his life easier but he doesn't like to, he wants the people he hurts to know that he hurt them, and be able to have their own reactions to that, and form their own conclusions about it—and the way his power works, he can make people his, and be able to use his power on them anytime he likes, and he wants that a lot, it's one of the best things there is in the world, and it means he can safely let them leave his car with their memories intact, but it only works if they agree of their own will, he can't mind-control them into it and he doesn't want to trick them into it so that means that if he wants to own someone and they'll only agree if he promises not to hurt them he'd better make that promise and stick to it—
And—
His eyes flare gold, and he restores her memories. And he's afraid she'll never want anything to do with him again, and he's certain beyond doubt that it would be fair for her to never want anything to do with him again, even though he's sorry, and he is definitely sorry—she's so good when she's happy, it wasn't worth it, hurting her felt good but if that momentary pleasure makes her never want to speak to him again then the cost was too high and he wishes he could go back and make it not have happened but he can't, he did that, it will always be true that he did that, being sorry doesn't make it not real, regretting it doesn't make it not real, being sure he'll never hurt her again doesn't make it not real, taking her memories away doesn't make it not real, nothing makes it not real because it is.