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Miss Rivers is the teacher at the Pirate Transmogrification Academy on Knuttin Atoll. She has been hired by Ozzie Mandrill to reform the pirates formerly of Jambalaya Island from their deviant behaviour before they can be reintegrated into proper society. She commonly confiscates piratey items from her students, such as Mungle's chewing tobacco.
She has a severe hatred of pirates and tells her class that they ought to be "dragged into the street and shot like the dogs [they] are." Her students include Mungle, who is unable to answer enough questions correctly to pass; Yangja, who answers questions correctly but fails because, according to Miss Rivers, her "attitude stinks"; and Guybrush, who will be banished and labelled a dunce when he answers all the questions horribly wrong.