Fairy Tail: Fairy Tail | Natsu Dragneel | Strongest Team | Sirius Team | Founders | Other Members
Other Guilds: Official Guilds (Blue Pegasus | Lamia Scale | Saber Tooth) | Dark Guilds (Oración Seis | Grimoire Heart | Tartaros) | Crime Sorcière
Kingdoms and Regions: Kingdom of Fiore | Edolas | Alvarez Empire
Other Characters: Main Villains | Celestial Spirits | Dragons | Magic Council | Criminals | Others
Prequels, Sequels, and Spin-Offs
Main: Zero | 100 Years Quest
Other: Ice Trail | Blue Mistral | Fairy Girls | Gaiden | Happy's Heroic Adventure | City Hero
Anime: Series 1 | Series 2 | Series 3
Films: Phoenix Priestess | Dragon Cry
All spoilers regarding Fairy Tail and Fairy Tail Zero are unmarked. Examples pertaining to 100 Years Quest can be spoiler tagged if deemed necessary.
This page is for the one new character of Fairy Tail who only appears in the third and final anime series, which ran from 2018 to 2019.
Voiced by: Junichi Suwabe (Japanese)
The original Acnologia and guardian dragon of Montes Secreta, where the current Acnologia once lived as his personal physician back when he was still human. However, he betrayed the humans of the village after being attacked by Dragon Slayers, leading to his doctor's fateful decision to enact bloody vengeance against all of dragon-kind.
- Beard of Evil: He's an old, bearded dragon who turns against humans after suffering horribly at the hands of Dragon Slayers.
- Broken Pedestal: He ended up becoming this to Acnologia II after he went crazy and slaughtered the humans he had once protected. The pedestal was broken so hard, in fact, that Acnologia II took it out on every other dragon in existence.
- Create Your Own Villain: His actions ultimately lead to the rise of the current Acnologia, who destroyed most of dragon-kind in retaliation for his actions.
- FaceHeel Turn: He was the guardian of a secret village in Ishgal where humans and dragons lived in harmony. Unfortunately, the horrific injuries he sustained from Dragon Slayers drove him to turn against mankind and burn the village to the ground.
- Facial Horror: He is shown having lost entire chunks of flesh, including nearly half of his face, as a result of Dragon Slayers. And unlike the mostly Bloodless Carnage of the anime, we are shown the gory details for a brief moment.
- Genocide Backfire: After discovering the terrifying power that humans are capable of with Dragon Slayer magic, Acnologia I leads a purge of all humans in his village. Unfortunately, one of the humans that escapes ultimately takes up his name and becomes the one dragon responsible for wiping the race to virtual extinction.
- A God I Am Not: The humans living in his village saw him as their divine guardian. According to the then-to-be Acnologia II, Acnologia I had conflicting opinions on that.
- Legacy Character: He is chronologically the first to be called Acnologia, with the second and current Acnologia taking on his name.
- Light Is Good: Subverted. He has light-gray colored scales and a protective instinct towards the humans of Montes Secreta, leading them to deem him as their divine protector...until the existence of Dragon Slayer magic ultimately drives him to become the exact opposite of this trope.
- My Species Doth Protest Too Much: Subverted. Like most dragons in Ishgal, Acnologia I initially can't bear the thought of dragons killing and eating humans in the west, but once he discovers what humans are truly capable of with Dragon Slayer Magic, he wastes no time destroying the very humans he swore to protect.
- Predecessor Villain: He is the dragon who single-handedly led the current Acnologia—the ultimate villain of the entire series—to deem dragon-kind as an inherently evil race and eventually abandon his love for humans as well.
- Stronger with Age: He appears to be rather old and feeble for a dragon, but he's a dragon nonetheless, making him one of the most powerful creatures to walk the face of Earth-land.
- We Used to Be Friends: He used to be on cordial terms with Acnologia II, giving him words of encouragement when he doubted his own ability to protect dragons against the power of Dragon Slayer magic. Unfortunately, after being subjected to that very magic, Acnologia I snapped and destroyed everything Acnologia II had, including his love for dragons.