Judith is a anthropomorphic brown llama with a black top tight long sleeved shirt and a light blue tall skirt and red framed glasses. She also wears high-heeled boots.
Judith is shown to be very serious about her work and upholding her duties to the bank she works for, although her mission to claim payments from the Moon Theater and shut it down is antagonistic to the goals of Buster Moon and his friends. She does not seem to hold any personal resentment towards them or the theater, however, as she happily attends it's grand reopening.
Judith works for the bank to which Buster owes a large amount of money. She calls the theater to speak with Buster, but his constant avoidance of her calls inevitably led her to see him in person and threaten him to pay his debts or the bank would repossess the theater property.
After the theater is destroyed, she is seen setting up a sign declaring the theater (or rather the address where it stood) was bank property.
After Buster and his friends threw together a makeshift theater for them to perform, Judith arrived, interrupting Ash's performance and declaring that Buster, his friends, including the audience, were trespassing on bank property, and demanded they leave.
Ash refused to oblige and carried on with her performance, Judith angrily threatening her intent to call the police, but the audience, riled up by Ash's performance, made it difficult for Judith to leave, and she wound up getting pierced by some of Ash's quills.
She later accepts Nana Noodleman's purchase of the property, and attends the grand-reopening of the theater.