Siegfried is the main villain in the third part of the story. The Prophets believe the only ones who can save Filgaia in its current state are the Demons. The Demons were destroyed long ago, but the Prophets realized they could revive one using the knowledge in the artificial library, Hyades. In order to do this, they had to find a suitable host to fill the Demon Spear with life force from the Guardians. The host they eventually chose was none other than Janus Cascade. After the Spear gathered enough energy, the ghostly figure of Siegfried appeared. Janus battled with him, but was defeated, and Siegfried materialized once again. Siegfried planned for all of Filgaia to become a Demon planet using Nanomachines. With the Prophets, Siegfried activated a flying fortress, Deus ex Machina, and planned to spread Nanomachines from that base. While on the base, he wonders if it was another demon that took the Yggdrasil Generator, and he comes to the conclusion that it was a Dream Demon. After Leehalt Alcaste is defeated, he takes matters into his own hands and battles Virginia's group. Virginia and crew, however, were victorious in battle against him, stopped the spread of the Nanomachines, and destroyed the Deus ex Machina. As a last attempt to overpower the team, he merged with a Wyvern and became Dragna Sieg. He was conquered by Lombardia. (Source: Wild Arms Wiki)
