Lloyd de Saloum

The seventh prince of the royal family that rules the Kingdom of Saloum. He was reincarnated and grows up with the memories of his previous life as a sorcerer. Although he's only ten years old, he has an enormous amount of sorcery knowledge and possesses mana that even terrifies demons. He's not interested in things such as succession to the throne, girls, or romance. Instead, his activities and desires are all focused on the research of his beloved sorcery and its practice.

(Source: Official Site)