Isendilan

Isendilan was once candidate to be the Red Dragon Queen husband

Overview
In the game, Isendilan had many names, such as "Wings of Destruction," the "Fallen Dragon," and the "Destructor of the World." The scariest thing about him was that, even though he'd fallen, he didn't fully obey the demon god. He still had a level head. He had sunk into sober madness!

That was the scariest thing.

His abilities were shocking as well. In the game, he had fallen near the middle. At that time, the density of Mana had started rising. Isendilan's power shot up to the Legendary Pinnacle!

Yes, he reached the Legendary Pinnacle, and he was a Dragon, meaning he had nearly endless strength. Even Eliard, who also reached the Legendary Pinnacle in this life, was no match for Isendilan.

If the Red Dragon Queen Gretel didn't fight against him with the Red Dragon Army, his damage to Firuman would be comparable to the Lord of the Deep, Nozama.

Trivia

 * Isendilan's goal was to become the king of the world so everyone would bow down to his dark rule. This included the Red Dragon Queen Gretel who had always been above him.