The Avatar first met her at home in Ultima VII. She had little to say and just talked about her parents and a little about Vesper.
After hearing from Yvella that Catherine vanished regularly around noon, the Avatar searched for her and found her at For-Lem's house, who was giving her history lessons by telling her stories of the past. She begged the hero to not tell her parents. Should the Avatar not keep their secret, her father would kill For-Lem.