Schwarz

is a member of the Demon Clan and the leader of his own group of warriors in the Demon Realm.

Demon Realm arc
Schwarz sensed the presence of the Four Knights of the Apocalypse and their allies arriving in the Demon Realm and quickly went to warn the Demon King, Zeldris about the intruders supposing they could be Holy Knights from Camelot.

Schwarz led a troop of demons to capture the intruders, but finding Percival among them, Schwarz take him and the Percival Platoon to Zeldris, who reveal Percival's connection with the Demon Realm.

When everyone is forced to stay in the Demon Realm until they can get to the Behemoth's portal, Schwarz challenges Tristan to a fight wanting to see the fierceness of Meliodas's son. However, when Schwarz manages to defeat him, he taunts both him and Meliodas saying that he must have used some trick to defeat the Ten Commandments.

Schwarz then leads his group to find and eliminate the Holy Knights of Camelot hiding in the Demon Realm.

A week later, as the Four Knights of Apocalypse head towards the Behemoth, Schwartz and his men are revealed to have been captured by Mortlach's group who use them as hostages along with Gawain to force Percival to save them from the Behemoth's negative energy. The demons curse their situation, since they did not expect there to be a Goddess magic user among the enemy.

When Percival and Mortlach disappear, the demons curse the humans which leads Rosebank to say the same about them. Then, she pulls out her Chaos Staff and uses it to fuse Schwarz and his companions into a giant monster under her control.

Abilities and Equipment
Schwarz proves to be a very powerful demon, being able to defeat Tristan even when he began using his demonic power.


 * Transformation: Schwarz is able to assume a form in which he becomes bulkier and stronger. His strength and endurance increase to the point that he is able to withstand Tristan's attacks and incapacitate him with a couple of hits.

Weapons

 * Large sword: Schwarz wields a large one-handed sword.

Trivia

 * Schwarz's character design is very similar to Bellion's.
 * As shown, his subordinates also share several similar traits to the Six Knights of Black.