Silty is a wombat from Arkansas. She is (slightly closer than) friends with Spongebox but a bit distrustful of him. She is also friends with Petrock but again, is distrustful. The underlying reason for this is Spongebox and Petrock's tendency to break things. She also went to high school with wombat.
She goes to the Krabby Krust every other Tuesday to get an amazing burger of burgerness.