Responses
Yep, the flower naming for the main characters is great. Just trying to make sure the OP wasn't confusing the characters red spider lily vs. lily of the valley.
Here's a link for the name explanations, *CONTAINS SPOILERS* because it mentions characters not introduced yet.
https://forgetfuldreamer.wordpress.com/2017/09/29/school-arc-character-tidbits-afterwords/
This is from the novel, which is wonderful
https://www.novelupdates.com/series/it-seems-like-i-got-reincarnated-into-the-world-of-a-yandere-otome-game/?pg=5
I'm wondering if other people pronounce her name like I do. Her name is lycoris(lily) and I keep pronouncing it as licorice (like the candy)