satan_(umineko)
One of Umineko no Naku Koro Ni's Seven Stakes of Purgatory, and representative of the deadly sin of wrath. As short-tempered as her sin would imply, this third-eldest Stake can be differentiated by her curly, platinum blond hair.
The human she is based on is Sanon (Umineko).
Named after, of course, the Adversary of Abrahamic faiths.