Clio is one of Rectina's adopted daughters.
Named after Clio, the Muse of History. She is usually seen wearing a bright orange tunic and develops a romantic liking toward Lupus. She is a talkative but adventurous girl and befriends Flavia Gemina and the group, despite Flavia's hostility to her at first.
Clio is almost killed by the eruption of the volcano after she attempts to rescue her mother and sisters who are trapped in their villa. They all survive, as is revealed in The Assassins of Rome when she visits Lupus, who was concerned enough to ask Felix to find her.