As a human, Elefseria appears as an old man with a wrinkled face, long white-grayish hair, and a drab of an old-style magician with a wizard's hat. As a dragon, Elefseria appears as a large, bearded dragon with horns, uniquely shaped arms and claws, as well deer-like antlers.
Elefseria appears as a jovial old man who has a perverted side evident from teleporting between Lucy's cleavage. However, he can also be solemn and full with fortitude and gratefulness as such when he was dealing with Team Natsu and smiled at their vow to complete the quest he has posted for over 100 years.
In the year X633, Elefseria bore witness to countless Mages who were killed by those who believed Magic to be an evil power. He tearfully declared that Mages would need to be protected and united, thus forming Magia Dragon, the first Guild in the history of Earth Land. At some point in his life, Elefseria taught himself Dragon Slayer Magic in order to combat the Five Dragon Gods. As a consequence of overusing his power, however, he ultimately transformed into a dragon. Since then, Elefseria posted a job request for other Guilds that would go unfulfilled for over a century due to its immense difficulty with only Gildarts Clive returning home alive, gaining the designation of a "100-year quest". In X693, he murdered Dogramag, the Earth Dragon God, in a strife that ended with his heart being devoured by the latter.
100 Years Quest arc
Water Dragon God arc
In X793, Elefseria appears before Team Natsu at the ruins of Magia Dragon in the form of a Dragon, welcoming them as the 99th group of adventurers who have accepted the 100-year quest since its original posting. As the Mages question what business a Dragon has at such an old Guild, Natsu Dragneel and Wendy Marvell sense that he is actually a human. Impressed by their perception, Elefseria assumes his human form and reintroduces himself as Magia Dragon's First Master, explaining his identity as a self-taught Dragon Slayer who turned into a Dragon. He proceeds to fawn over the stunning female Mages, complaining over the middle-aged men who have only ever accepted the job, before noting that not a single one of them has ever returned from the quest alive, save a terribly maimed Gildarts Clive, sternly questioning the group if they're prepared to undertake such a dangerous quest.
After having the team sign written oaths that they are never to speak of the quest's details to anyone and that the Magic Council will not be held accountable for their potential deaths, Elefseria reveals that they are to seal the Five Dragon Gods, describing each of them as being as powerful as Acnologia. To his surprise, Erza Scarlet reveals that Natsu has already defeated Acnologia, to which Elefseria proclaims that they will be his last hope of anyone being able to complete the quest. He provides them with a lead on the whereabouts of the first Dragon, Mercphobia, in the port city of Ermina. As a final statement before the team disembarks, he tells them that their reward for success will be any one thing in the world that they desire.
Wood Dragon God arc
Great Labyrinth arc
Magic and Abilities
Law Dragon Slayer Magic (法の滅竜魔法 Hō no Metsuryū Mahō): Elefseria taught himself this Dragon Slayer Magic, but like most Dragon Slayers, the extensive overuse of this Lost Magic transformed him into a dragon. The element of law is the power of information, having all knowing knowledge of the magic world. Through this Magic, He claims to have learned about the Magic world's "negative legacy", a certain Magic weapon comparable to Etherion and Face that no humans of the current era ought to know of.
Shape-Shifting: Similar to Acnologia and Irene Belserion, Elefseria is capable of shifting between his human and dragon forms at will, although Dragon Slayers are capable of identifying his human identity by his scent. He is capable of changing his size to smaller proportions. As a side effect from his dragonization, Elefseria's organs are changed as well. After his heart was devoured by Dogramag, his body created a replacement organ for his heart, enabling him to survive without a heart. His heart still beats even after it was removed, but he is unsure whether it was covered with a spell or if regenerated from Dogramag's power, and can feel it from a distance.
- Flight: As a Dragon, Elefseria possesses the ability to fly, using his large wings to travel great distances.
- Enhanced Smell: Elefseria has an incredible sense of smell, which he shares with other Dragon Slayers. He can instantly tell that Gajeel and Laxus are Dragon Slayers after smelling them.
Staff: Elefseria possesses a wooden staff that he carries around.
Orb: Elefseria possesses a orbt that he's able to have images appear within it.
- Eleftheria is a Greek word meaning "freedom".