Satan

Representing the demon Satan and the corresponding sin of Wrath. Satan's appearance is a girl with short, curly pale hair. She is easily angered, but really wants someone to be angry with her. She is the third eldest 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)