Ptellung was a Ssi-ruu scientist during the Battle of G'rho. After luring the young Force-sensitive Human male Dev Sibwarra aboard a Ssi-ruuvi ship, Th'twirirl brought him to Ptellung's laboratory to be stripped, measured, and probed. When Ptellung was done studying the boy, Th'twirirl gave the Human to Yifaii.