Lucifer

Alias The Demon Lord Amongst Demon Lords (大悪魔中の大悪魔だ, Dai akuma-chū no dai akumada) Race: Demon Gender: Female Eyes: Silver Hair: White Affiliation: Shinobu Takamiya Base of Operations: Demon World Status: Alive First Appearance Manga Debut: Chapter 207 Lucifer (ルシファー, Rushifā) is a Demon who once attempted to usurp the royal throne in the Demon World. She is currently with the young Spell Master, Shinobu Takamiya. Lucifer is an extremely silent and indifferent girl, practically to the point where she even appears mute. However, she is described by Takamiya as being more cruel and heartless, which has yet to be proven false in any way, given how Lucifer mercilessly carved out Furuichi's heart with no show of hesitation or even remorse for her actions. This is further supported by the fact that Lucifer always has an expressionless, almost distant face in all situations Sometime in the past, Lucifer fought against the Demon Lord for possession of the royal throne, effectively pulling the Demon World into turmoil. Lucifer eventually left for the Human World where she came to possess a young boy named Shinobu Takamiya. Despite having possessed him when he was a child, Lucifer and Takamiya are on amicable terms. She often rests upon his shoulder even during a fight and assists him when necessary.However, Lucifer usually lets him fight on his own and tends to disappear when she is not needed. (Source: Beelzebub Wikia)