Zombie Dragon

The Zombie Dragon is the reanimated corpse of the Original Gaelion, Wyndia's adoptive father.

Overview
After Ren slew the "dragon causing problems" on the mountain near East Village, Gaelion's body started decomposing, leaving the land horrendously polluted and because he was a fragment of that Dragon Emperor, his core's magical power reorganized into the flesh of the Zombie Dragon. During the fight, Naofumi's dear companion, Filo, gets eaten and Naofumi believes she has died. He is overtaken by anger and his lack of strength, giving into the Wrath Series' temptation for power. Using its strength, he is able to counter the Zombie Dragon's attacks, dealing incredible damage with each counterstrike, but slowly losing his ability to remain sane. Moments after, he feels like he will lose to the shield's influence, and he is pulled back to sanity by Raphtalia. She receives severe burns due to her actions but does not regret helping him. At this point, the Zombie Dragon has still not been defeated and is preparing for another attack, but it suddenly ceases moving while Filo bursts through its chest with its core in her mouth. With the corpse no longer moving, Naofumi absorbs a mass of it into his shield and Filo eats a few pieces, including part of its core.

Later, after Naofumi's dragon egg hatched, Wyndia named it Gaelion after her deceased adoptive father.