Evil Is Sexy - All The Tropes

Other factors being equal, evil characters are sexier.

Vain Sorceress - TV Tropes

Assistant to the Villain by Hannah Nicole Maehrer

Evil Is Sexy' trope - Forums

Evil Costume Switch - TV Tropes

Art of the Scare: Horror Clichés - Morbidly Beautiful

TV Tropes now has a page for sexy foxgirls, so of course the page image is from Plague. : r/TwoBestFriendsPlay

Sophia Anne Caruso and Sofia Wylie Discuss 'The School for Good and Evil' - The New York Times

Halloween Activities & Romance Tropes: So Wrong It's Right - Tor/Forge Blog

LGBTQ+ Horror Movies from 1932 to 2022: The 55 Best of All Time

5 Sexist Female Tropes We Need to Stop Writing, by Lin

Suggestion: Evil Is Sexy.Helluva Boss - TV Tropes Forum

What is the 'born sexy yesterday' trope and why is it problematic? - Quora