Aspan

The Aspan are a species from the mobile game Valerian: City of Alpha, they are a part of the radioactive class in the game, and are 1 of the 3236 species of the space station Alpha. According to the book of the film, they come from Eos, a planet with a toxic atmosphere that only they can breathe or else they die, that is why their masks are filled with chemical components of their homeworld´s atmosphere.