This is Edrio Two Tubes. He is a new character that is being introduced into the Star Wars universe, and he will make his debut in Rogue One: A Star Wars Story. He's a Tognath bounty hunter, and he's also a pilot who is an ally for the Rebel Alliance and works with Forest Whitaker‘s character Saw Gerrera. The official Star Wars Facebook page offers us a brief description of Edrio Two Tubes:
Edrio Two Tubes is a mercenary pilot who flies alongside his eggmate, Benthic. The two share the nickname derived from the breathing apparatus that allows their Tognath physiology to process oxygen atmospheres. Edrio’s home world Yar Togna was conquered and occupied by the Empire, forcing him to flee as a refugee. Desiring to strike back at the Empire, Edrio and Benthic have allied with Saw Gerrera.
There's no word on how big of a part he'll play in the story, but I doubt we'll see a lot of him. I think this is one of those characters that we'll probably see in one or two scenes. Regardless of how much we see of the character in the movie, he's got an incredibly cool and crazy look that I like. Just from the looks of the character, I'd love to see a back story on this guy. It'll be fun to see how he's incorporated into the Rogue One story.