Laymia

is Lamia's mother and seems to be one of Behemoth's closest advisors and the one in charge of the 34 Pillar Division before Jabberwock's return.

Appearance
She is a tall woman with an unfathomable expression who is seen heading a meeting of the Squad's generals. Laymia bears a strong resemblance to her daughter, having pink hair and green eyes.

Personality
Although her daughter sides with Beel, she is one of the main architects in the plot to kill Oga Tatsumi, and deprive the demon baby of his Contractor in order for En to ascend the throne.

Powers & Abilities
Being the one in charge of the 34 Pillar Division before Jabberwock's return, no doubt she could be a formidable demon.

Trivia

 * Laymia and Jabberwock are childhood friends.