Yma Nalle belonged to the famous Nalle triplets, who were three Humans provided by Mayor Acros-Krik to act as guides for individuals he wished to keep under surveillance. She would relay any significant details that their unsuspecting visitors revealed to the mayor.
Prior to the outbreak of the Clone Wars in 22 BBY, she could be found at the Outlander Club located on Coruscant.
Amy Allen played Yma Nalle (without credit) in Attack of the Clones. Her character's name is derived from a rearrangement of "Amy Allen."