Schwarz's Group

Schwarz's Group is a group of Demons led by Schwarz, under the rule of the Demon King, Zeldris.

Demon Realm arc
As soon as the Four Knights of the Apocalypse and their allies, arrives to the Demon Realm, Tristan's Platoon, Lancelot and Ioladio gets separated from the rest of the group. Then, they are surrounded by Schwarz and his men and are taken into custody, but manage to be freed after Ioladio reveals that one of the Four Knights is actually Percival, the savior of the Demon Realm.

Later on, as the Four Knights and their allies are training until they are ready to face Behemoth, Schwarz decides to challenge Tristan to test the strenght of the son of Meliodas, one of the Seven Deadly Sins who defeated their heroes, the Ten Commandments, while his men watch and cheer for Schwarz. After a fierce battle, Schwarz defeats Tristan, mocking him and his father saying that he must have used a trick to beat the Ten Commandments.

A day later, while the group senses the Behemoth's magic coming closer, Schwarz declares that in six days, they will guard Percival on his way to the Behemoth, but before that, they must clean out the intruders who invaded the Demon Realm. With that in mind, they fly out to look for the Chaos Knights and eliminate them all.

Later on, as the Four Knights and their allies travel across the Behemoth's back, the Albion they were piloting is taken down by the Chaos Knights, forcing them to get out of it. Observing the Chaos Knights have difficulty to survive the Behemoth's evil force, the heroes decide to just leave them to die, but as a last resort, the Chaos Knights reveal that they have captured not only Gawain but Schwarz and his men too, due to one of their knights having Goddess powers.

After witnessing Percival being teleported away to a one on one combat with Mortlach, Schwarz and his men are fused into a monstrous creature by Rosebank using her Chaos Staff so they aid her and the other knights in their battle.

The demons return to their original form after Tristan and Gawain defeat the Testament Beast. They then set about apprehending the defeated Chaos Knights.

Trivia

 * The members of this group share a strong resemblance with the members of the Six Knights of Black:
 * Schwarz looks similar to Bellion, with very similar clothing and sword. Both are the leaders of their groups,
 * One of the members looks similar to Pump, but with an elongated head.
 * One of the members looks similar to Dahaaka, but with more and longer hair. They have similar electric abilities generated by their hair.
 * One of the members looks similar to Atollah, being much shorter in stature and having several spikes in its head.
 * One of the members looks similar to Galla.
 * One of the members looks similar to Derocchio, but having a tiger-like motif rather than a lion's.