Lui

Dola's eldest son and a member of her gang of air pirates.

He has dark brown hair, dark eyes, a long face with a square chin, and a mustache. Like the rest of the boys in the gang, Louis almost always wears a brown shirt with pink pants, a belt, a red hood, and brown slip-on shoes.

As the oldest of Dola's sons, Louis is more or less their leader. He is first seen capsizing a civil airship; right at the beginning of the movie. He tries to catch Sheeta, but she escapes by falling from the airship. He and his brothers are looking for her, but they stop and continue the search the next day.

(Source: Ghibli Wiki, edited)