Sir Isaac Ray Peram Westcott (in Japanese: アイザック・レイ・ペラム・ウェストコット, Aizakku Rei Peramu Uesutokotto) or also known as Isaac Ray Peram Westcott, Ike or Isaac Westcott -- and later known as Beelzebub Demon King is the main antagonist of the Date A Live franchise; he was introduced as the unseen secondary antagonist of the second half of the first season and the main antagonist for the rest of the series. He is an evil and ruthless British man who works as the corrupt managing director of the largest company in the world, Deus.Ex.Machina Industries. He is an arrogant, selfish, sadistic, insane and childish person who has a abnormal mind or, in other words, a "cruel and twisted" businessman with a diabolical ambition.