Lucifer

Lucifer (ルシファー) is the main villain and final boss from Ragnagard.

Story
Lucifer is the Demon King who rules over hell. For a long time he's been plotting the downfall of the heavens, seeking nothing but its complete destruction. With the Heavenly Battle going on, he sees the perfect opportunity to finally move his plan forward, sending in his minions Behemoth and Eelis to attack the heavens while also deciding to attack it on his own, moving away from his throne for the first time in centuries.