A scholar at the Magic Academy who researches and develops magic technologies. He is a young genius at the Magic Academy which gathers knowledge from all of the continent in various fields. His knowledge of magical technology is second to none. He researched a way to fly in the sky in order to reach his mother, who is a Featherian. The Featherians live on a floating island in the sky.
Unfortunately most of his magical devices, even though they are successful, are declined from the Magic Academy staff for being possibly too dangerous for the public. He doesn't mind this though, since he does science for his own enjoyment. He gives the money he receives from his research to the villagers of his hometown.
He is a kind and intelligent person who doesn't show off his talent; because of that he is admired and popular in his hometown, Bronyeu. He is the son of the village's manager; this village is a humble farming village. His father's actions and ideals were full of humanism, and they greatly influenced Ariost. He is inspired to keep working hard even if no immediate rewards are given.