Ten Commandments

The are an extraordinarily powerful group of elite warriors even among the Demon Clan, handpicked by the Demon King himself. Each of them possessing powers typically associated with demons along with a unique ability or "commandment" given to them by the Demon King himself.

Overview
Three thousand years ago, the Ten Commandments fought for their clan against the Four Clans (Goddess, Human, Giant and Fairy) in the Ancient War but were defeated and sealed by the Coffin of Eternal Darkness but Fraudrin managed to escape and sought ways of releasing his people for centuries until the present day when Hendrickson freed them and felt great fear from them upon sensing their presences.

Deciding to recuperate their lost magical powers drained by the Coffin, the Ten Commandments left for Edinburgh while leaving a terrified Hendrickson behind. Arriving at their location, they were surprised to see the Maiden Castle to be in a messed up state almost unrecognizable, unaware of Escanor behind the castle's current state and later a very deep hole caused by Meliodas, but rested there anyway.

Their presences in Britannia have awoken two of the Demon Clan's Albion, one at Camelot and the other at the Fairy King's Forest, which both of them were destroyed by the Dragon's Sin of Wrath and King. Sensing the Albions' destruction, one of the Ten Commandments, Galan was delighted to know that there's still powerful people even in the current age and decided to take action despite they still yet to recover their full power where he traveled all the way to Camelot and encountered the Seven Deadly Sins where he easily overwhelmed them in their first encounter.