Percy Jackson and the Olympians: Legends

Keto appears at first as a worker for the aquarium, appearing to be in her twenties. She has frizzy black hair, which she pulls to the side in pigtails. She has dimpled cheeks, braces, and thick-framed glasses, which makes Percy think she looks like a schoolgirl nerd. Keto wears a Georgia Aquarium polo shirt with dark slacks and black sneakers.

Keto has a somewhat bubbly personality and is fond of large sea creatures. She enjoys sharing her knowledge with anyone that will listen to it and has a habit of bouncing around on the balls of her feet, as if having problems containing her energy. Despite being the mother of sea monsters, Keto seems to be unfeeling toward of forms of life, casually talking about sedating other sea animals on display and trying to teach them tricks. She is somewhat vengeful, sending her son after the crew of the Argo II after they defeated her. Like many children of Gaea, Keto demonstrated a loyalty to her mother and was willing to support the Earth Goddess during her war against the Olympians, dispatching sea monsters to support the defenses at Delphi.

Years ago, Keto and Phrocys joined Kronos to fight against the gods in the Second Titan War. However, once Kronos was defeated and his army fell, the two were banished to Atlanta, a landlocked city in Georgia. They made the best of it and opened up an exhibit in the Georgia Aquarium. While Percy Jackson, Frank Zhang, and Gleeson Hedge are waiting outside the Georgia Aquarium to hopefully meet Phorcys for information, they all reach into their pockets to see if they have any money to pay for entry. Frank only has three denarii, which a girl quickly scoops up and says that it is the right payment for the VIP tour. While the group feels that this is most likely a trap, they follow the girl into the aquarium and find that her name tag says Kate. As Kate gives them the tour, she seems excited about the larger sea creatures and gives the group very detailed information, but is uninformed or uninterested in the smaller creatures (calling some fish in a tank the "yellow ones").