Avocado is a TPOT recommended character that was eligible to join but only got 2,874 votes.
Avocado is shown to be a bit rude and speaks their mind, as they think Two is too predictable.
Avocado is an armless avocado that has a wide mouth and white eyes. Their mouth is animated differently; it resembles as if a slice was taken out of Avocado. It also shows the pit inside.
Avocado's audition is them walking until they look at the camera and gasping for seemingly no reason, most likely to reveal their unique open mouth.