Lucifer

ルシファー

Representing the fallen angel Lucifer and the corresponding sin of Pride. Lucifer's appearance is a girl with straight black hair. She is haughty and disdainful, but in fact takes pleasure in surrendering. She is the eldest amongst all of the "Stakes of Purgatory." [Spoiler] She is the fantasy version of one of the servants that used to bully Sayo Yasuda as a child. [/Spoiler] (Source: Wikipedia)