Zepar

Zepar is the 16th highest ranking earl of hell, named after the demon of the same name, and is Furfur's twin. Despite having the appearance of a girl with long, light-blue hair and a darkly-colored dress, Zepar might be male since Furfur is said to be of a different gender. Zepar appears alongside Furfur when summoned by those who seek romance, and has the power to seduce humans. Zepar can also grant unlimited defensive power and even brief immortality to those who contract them. Visual novel seiyuu: Saiga Mitsuki (斎賀 みつき)