She is the only Book 2 bot to be a Book 1 skin.The tip of her dress is actually tethered rather than the normal dress model.
Piggy has two eyes, like many of the infected characters only one pupil is visible, with it being a Neon bright red color. Her skin is a slightly faded light pink color, as well as her ears, snout, and arms her cheeks are a slightly more tinted color than her skin, visually being more red than pink.
Piggy's design was originally based on the character design of Granny, like that antagonist, she wears a long red dress that fades in color the higher up the player looks. It is the "default" skin that is equipped when first playing a round as Piggy. She is the infected version of Penny Piggy.
Piggy is the first skin, titular antagonist and mascot of Piggy.