"Laffin Baffin" the Gonnhirrim is referred to by all including himself.  The name holds true as the muscle-bound tin can covered in razor-sharp blades that protrude form his armor laughs at anything, even if no one else finds it funny.  He is friendly and helpful and utterly insane.  Fori says he brought him along to point at the enemy and release, just in case the rest of the group needed time to run.