He is quite obedient to his father and loves his cause. His father lectured him for stealing the 'zinger', implying it wasn't the first time he took King Pistachion's punchline. Like his many siblings, Jerry tends to behave much like a teenager.
Just like the other Pistachions, Jerry is a giant walking pistachio plant with a large pistachio for a head. He has deep red eyes and sharp teeth.