Derieri

is a demon and a member of the Ten Commandments, a group of elite warriors of the Demon Clan handpicked by the Demon King himself. She was sealed away along with the rest of the clan in the Coffin of Eternal Darkness until she was set free by Hendrickson.

Appearance
Derrierie is a tall, toned woman with long, spiky hair. She wears no clothes, instead covering about half her body in her own darkness. She has Demon Clan markings on her left check which resembles an open mouth with a circle, in between.

Personality
Derrierie has a tough, rude, and nasty attitude while being carefree. Derrierie always prefaces her comments with and only Monspiet can understand the true meaning of her words.

3,000 years ago
Along with the rest of the Demon Clan, Derrierie was sealed away by the Goddess Clan after losing the Ancient War against the Four Races (Human, Fairy, Giant and Goddess Clans).

Current arc
After Hendrickson managed to remove the seal, Derrierie and the rest of her fellow Demon Clan members appeared before the terrified former Great Holy Knight and Fraudrin in Dreyfus' body with Zeldris uttered Meliodas' name as if he knew him. After being informed by Fraudrin of the current events in Britannia, Zeldris suggested that they should head for Edinburgh Hill for recuperation of their severely drained magical powers due to the seal they're trapped in, which everyone agreed and left Zhuhur Valley by flight, leaving a terrified Hendrickson.

Arriving at Edinburgh Castle, Derrierie and her fellow Ten Commandments find a castle ruins and concludes that it was Meliodas who caused the destruction of the castle as if there was a great battle fought there. After Galan battle the Deadly Sins, Derrierie and others got bored of waiting for their magic to return and decided to go around and eat human souls to return their magic since Britannia magic got weaker. While the human got weaker, their soul were still tasty and continued to eat them by sending a Red Demon and a Gray Demon until the demons were stop by three Holy Knights and Hendrickson. Derrierie was soon pay a visit by Meliodas through teleportation and beat up Galan as payback.

Abilities/Equipment
Like all members of the Demon Clan, Derrierie possessed a Black Mark similar to Meliodas, utilizing the mysterious jet-black matter as shown forming wings for flight and as a member of the Ten Commandments, she may be exceptionally powerful. Her aura is so powerful that made the normally calm Hendrickson sweat in fear of their mere presence. Derrierie shown the power to devour souls of any races, leaving them in a zombie like states.

Monspiet
She and Monspiet seem to be very close as she was shown resting her head on his lap as well as being shield by him from the rocks caused by Galan's attack on Meliodas.He also happens to be the only one who understands what she says.

Trivia

 * Her name is likely to be a reference to the french word "Derrière", the french word for ass directly relating to her unique way of talking.