ケイブリス

Level/Level Cap: 240/255
Skill Level(s): Sword Combat LV2, Magic LV1

The oldest Demon alive, who served under the very first Demon King thousands of years before the creation of humanity. 

Following the death of Demon King Gai and the induction of Miki Kurusu as the latest Demon King, he formed his own faction of monsters with the intention of kidnapping and killing Miki in order to make himself Demon King.

A massive and absurdly powerful creature, he rules exclusively through fear and manipulation, with none of his subordinates even slightly respecting him. He is naturally crass and violent, and is prone to fits of rage that result in a large number of deaths.

He harbors feelings for Kamilla, who finds him repulsive, and becomes a stuttering mess when in her presence. He often sends her gifts and poorly written letters expressing his love for her, though they are always immediately destroyed.