He's 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.
...A mi me parece un "Tusken customizado".