Piggy's design was originally based on the character design of Granny. Similar to Granny, she wears a long red dress that fades in color upwards. Her skin is a light pink color, as well as her ears, snout, and arms, although her cheeks are darker than her skin, visually being more red than pink.
Piggy has two eyes; like many of the infected characters only one pupil is visible, with it being a neon red colour.
Additionally, Piggy holds a baseball bat, which she uses to attack/kill players. She has a similar appearance to her other infected family members. As the bot, Piggy walks around with her head tilted slightly to her left. As a player, Piggy will Move her head sideways when idle but will be angled straight when moving.
The design of Piggy was created to imitate Granny, the main antagonist for the game in which the Piggy was based on.