Milim's Big Four

Milim's Big Four (四天王) is made up of Milim's top subordinates as of the events of Ambitions End. She made up the group on the fly due to being jealous of Rimuru having his own Big Four.

Trivia

 * The concept of the "Big Four" is common across Japanese media and in fantasy settings. It usually refers to the four generals who have to be defeated before challenging the Demon Lord.