Although more is told about Ydra in the novelization, Her name is spoken once in the movie, but it takes a sharp ear to catch it. When Ydra approaches Jen and Kira's table during the party, she says, "Jen, viselitye?" And immediately afterward, Kira laughingly retorts, "Ydra!!" This implies that she might have said something inappropriate or suggestive about Jen and Kira's potential relationship, which may have embarrassed Kira, even if Jen didn't understand what was said.
When the Garthim attack the Podling village, Ydra is captured and tossed into their cages to be taken to the castle. Jen sees Ydra screaming for help in the cages of the Garthim when the Gelflings and Landstriders battle outside the castle. He attempts to free her, but is unsuccessful.
When in the castle Kira encounters the captive Ydra only to find that her foster mother's essence has been drained; the once cheerful and merry Podling that she loved had become nothing but an expressionless slave. Kira is saddened and shocked, but once the Crystal is healed and the urSkeks rejoined, the Podling slaves, including Ydra, are freed and return to their regular selves again.