Gabriel Bá and his twin brother, Fabio Moon, are Brazilian comic book artists who were born in São Paulo. Their first work to be published in America was Roland: Days of Wrath, written by Shane Amaya. Both have appeared in several comics anthologies, including Flight and 24seven. Most recently, Bá illustrated Gerard Way's The Umbrella Academy.
Fabio Moon and Gabriel Bá
Fabio's and Gabriel's Art Blog
The Umbrella Academy, vol. 1: Apocalypse Suite