Writer's and reader's choice: one of each
Writer's choice: La belle dame sans merci
Illya is bewitched. Napoleon discovers how and why Illya succumbed. https://archiveofourown.org/works/19345672/chapters/46022977
Illya doesn't understand
Reader's choice: Peripheral vision, by Lindafishes8
A ghostly memory from Illya's past
https://archiveofourown.org/works/5159894
What does Illya see?