She's a five-star, and here are a couple links to her info:
https://harem-battle.club/wiki/Flowe...rl/FKG:Madonna
http://flowerknight.wikia.com/wiki/Lily
She's apparently based on this flower:
https://www.gardencentrekoeman.co.uk...dum_bloem3.jpg
"Lilium candidum", which shows up as 'Madonna lily' in image searches.