Cedar specifically. She's probably gonna be mates with an old character of mine named Charred, who has erythrism.
I have the story in mind that she fled to phyrria as soon as the tree wars begun and was praised as a mythological creature called a Blossomwing. Soon, Hivewing explorers found her and she couldn't keep the child. Charred was killed and Petal was imprisoned, to be on display.