|Title||The Demon of Pride|
|First Appearance||Turn of the Golden Witch|
|Voiced By||Yuka Saitou|
Her servant name is Runon.
Advanced-level furniture created by Beatrice. She can act by her own will, but she cannot disobey the orders of her master. She is quite powerful while in her human form, but when she returns to her true form as Stake of Purgatory and fly at her enemy at high speed, she shows her full, terrifying potential.
Lucifer is the oldest sister and therefore the leader of the Seven Stakes. Because of this, she claims to be the strongest of the sisters, but she's secretly aware that she's actually the least talented. However, she has always acted arrogantly in an attempt to hide this fact from the others. Her great fear is that her sisters would sneer at her if they ever found out. She's very haughty and arrogant, but she actually feels pleasure from submission.
She has long, straight black hair, a fair skin and big red eyes. Her clothes are the same as those of the other Stakes. She wears the one-winged eagle on her "skirt".
- Yasu created her in the image of a fellow head servant that worked with her nicknamed Garashi
- Garashi is her nickname such has Yasu is the shortened form of Yasuda. Her full surname is unknown.