Recruited by King Josef into the Royal Knights of Feendrache, Siegfried grew in reputation and eventually was entrusted to be one of the commanders in the Fafnir Suppression Force alongside Gunther and Hagen. In the middle of the battle against the dragon, Hagen tries to fulfill his malicious plot to have the other two knights slain and steal the glory. However, Siegfried sacrificed himself to defeat Fafnir but survived by drinking the dragon's blood. He detained Hagen and returned to Feendrache victorious. Siegfried became known as Dragonslayer and was promoted to king's bodyguard. Later, the Royal Knights were reorganized into the Order of the Black Dragons, with Siegfried as their captain.
Feendrache grew prosperous with the help of Isabella and the primal beast Sylph, who created a magical elixir called alma using Fafnir's blood. Later on, Siegfried went to investigate a strange epidemic in a village, which appeared to be caused by alma's by-product that soldiers of Feendrache were dumping into a nearby river. After returning to the castle with the report, Siegfried found King Josef on the brink of death, with Siegfried himself framed and accused of betrayal and murder. The king told Siegfried how to escape the castle before passing away, and the knight went into hiding, trying to find ways to expose the real villain.
Some time passed, and Siegfried managed to convince the knights with whom he served of his innocence and unsealed the dragon Fafnir to lure out the individual who framed him. He and the knights worked tirelessly to bring the conspirators behind poisoning the kingdom and killing the king to justice. Though Siegfried's name was cleared, he refused to become the new captain of the White Dragon Knights and went on a journey, seeking different ways to help his kingdom from afar.
Siegfried always had rough manners, which caused some problems in his relationship with other knights. After being forced to drink the dragon's blood to survive in the battle with Fafnir, he becomes tormented by destructive impulses. He's doing his best to hold a grip on his humanity for the sake of his kingdom and those close to him.
Siegfried is a tall, middle-aged man with long brown hair and bright eyes. He bears a long broadsword and wears dark, weathered armor with a torn cloak on his back, which benefits the image of a knight in exile.
Siegfried is a classic heavy-hitter who excels in close and mid-range with numerous options to apply constant pressure and dish out heavy damage. He can also activate Manigance to sacrifice a portion of his health for even more attack power.