Aymeric is a male Wildwood Elezen with short black hair and striking blue eyes. His armor is adorned in golden plating and accents, woven around black cloth and accompanied by a blue robe styled after Halonic albs worn by the Ishgardian Church. He wears steel gray boots accented with Ishgardian blue, and wields a blade of blue steel in battle.

Aymeric wears an alternative outfit when not in his royal uniform, which is a blue recolor of the Adept robe. While patrolling Empyreum, he wears a full blue Gaja suit while keeping his sword.

Though among the highest ranking Ishgardians, Aymeric's behavior is more pragmatic and open than one might expect of his station, with Aymeric considering himself a realist. Aymeric is a noble and virtuous leader who cares more for equality than status or race. His passion in his beliefs prompted Edmont de Fortemps to compare him fondly to his own son, Haurchefant Greystone.

Upon learning the truth of the Dragonsong War, Aymeric confronted his father about the matter and demanded to reveal the truth to all. Aymeric believes it is better for the people to start anew rather than maintain a heinous lie. After becoming the acting head of state, he labored to reform Ishgard to restore the bond between man and dragon and for high and lowborn citizens to live and prosper on equal footing. Aymeric places a great deal of faith in his people. Despite the tragedies of war and the hardships of truth, he believed the people strong enough to endure and prosper, unlike his father. Even the grim Azure Dragoon, Estinien Wyrmblood, believed Aymeric to be Ishgard's best hope for a new future.

Though Aymeric had no desire to be the next leader of Ishgard, he reluctantly accepted the position of Speaker of the House of Lords when his people elected him, showcasing him as humble and honest.

Aymeric becomes steadily more enamored with the Warrior of Light for their selfless service to Ishgard and forms bonds with them more-so than the other leaders of the Eorzean Alliance. Thancred Waters even comments that Aymeric may have romantic feelings towards the Warrior of Light. Their bond pushes Aymeric into becoming more actively involved within the Alliance, lending his military aid in Baelsar's Wall and later for liberating Ala Mhigo.