>>31751026>>31751145>>31751139Actually her debut implied she was born a rose, but according to the ARG Rosemi (or at least the "human" part of her) is Satan's daughter (eventually THE incantation of Satan) and lived with a human family until she met "The Rose".
You COULD explain it by saying it was The Rose's backstory (since The Rose and the girl were technically two beings before they merged), but otherwise the two backstories unfortunately contradict each other...