I never expected forgiveness

Lucifer is an actual literal god, and part of that is the power to inspire mortals. Most of her power is in her voice, particularly music, though just her presence can have an effect on people.

Not all mortals are susceptible. Most people aren't affected by all the gods, and some hear none at all; teenagers and young adults seem more likely to be influenced by them, but even for them, not every god can sway every mortal.

Those who are affected by her will know immediately that she is something more than human: it's something like a fairy glamour, making her seem more interesting, more charming, more attractive, just more than mortals. It makes people want to be around her, makes them want to listen to her - it's strongest when she's performing in some way, though she doesn't need to do that to influence someone. She can't make anyone do anything, because the extent of this power is capturing and holding attention and making them believe her... but she can make that in itself dangerous enough, if she's inclined.

(There is a possibility repeated personal exposure to gods, outside of performances, would make people less affected and impressed by them, if not totally immune to their effects.)

The effect she has on people lingers, too; people who have been affected by Lucifer will tend to be more rebellious afterward, more likely to challenge authority, question the status quo and generally cause trouble.

If you'd like to opt out of having her powers used on your character, or being tagged by her at all for whatever reason, drop a comment here to let me know!