Persephone was a Warpsmith who attended the Gallifreyan Academy. Nicknamed "the Ice Maiden", she had a gang of other Warpsmiths and did not interact with people of other species.
She invited Galadina to join the gang, telling her that she would soon have to choose between her people and her friendship group. Galadina eventually agreed to join and they were later scolded by Leela when they refused to study in the library with the Time Lords and humans. (AUDIO: Insurgency)