Black Vanguard

The Black Vanguard are a powerful group of warriors from the Demon Clan, whose strength was used by the Vanguard Alliance as a benchmark for the strength of the Commandments.

Overview
The Black Vanguard are mentioned by a member of the Fairy Clan while commenting on the strength of the Commandments. However, being so lawless, the Demon King abandoned them.

The Black Vanguard were part of the battle against the four races in the Dryad Temple, where an Indura brought destruction. When the victory of the Demon Clan seemed certain, the Great Sethiroh appeared and defeated the Indura, allowing the Celestial Clan to seal the Black Vanguard, the Indura and other demons within the Divine Star.

7,000 years later, when the seal of the Divine Star fell apart, The Black Vanguard were released from their imprisonment. Ka'iulani was the first one to escape, being faced by the Celestials and just before he can kill Gustavo, he was defeated by Kilimiester and Drakmir. The other five Knights were released the next day along with several Gray, Red and Blue Demons. They start to kill the Celestials and use their souls as sacrifices to free the Indura from the Divine Star. However, all of the members of the Black Vanguard, besides Adrenza, were defeated by the Ironclads Warrior Guild. Gardonza decides to sacrifice his companions' souls to the Indura to finally release it. Just before his demise, Gardonza also gives his soul to the Indura.