From PathfinderWiki
Race/Species Goblin
Gender Male
Homeland Mushfens, Varisia
Organization Wind Whisper tribe

Source: Rise of the Goblin Guild, pg(s). 9

Plarg is Ekkie's cage-brother from the Wind Whisper tribe in the Mushfens. They grew up together in the same cage and, after Plarg died, Ekkie took his skull with her and is talking to the skull as if Plarg were still alive.[1]