Mephista is a demonic supervillain from Marvel comics and the daughter of the archdemon Mephisto - she is not as prominent as her brother Blackheart when it comes to making trouble for mortal life but she is every bit as dangerous if she puts her mind to it: she is a recurring enemy of Doctor Strange and resides in the same dimension as her father and brother, which mortals often refer to as "Hell" despite it not being the true Hell of Christian belief (many demons, Mephista included, are quite happy to play along with humanity's belief in a single Hell and Satan in order to further their own infernal influence).