Sean's mother who is captured and held prisoner in a castle headquarters. She devises a plan to trick a young guard for keys and creates a riding distraction to allow the children to seize weapons. Later reunited with Sean at a human camp where her implant is removed.
Their family bond drives Sean's rescue effort and Kate's escape plan.
The plot identifies Kate as Sean's mother, and Sean helps reach the castle after learning that she has been captured.
Smythe exercises authority over Kate's captivity, while Kate ultimately deceives the guard and escapes.
Smythe speaks with Kate while she is held prisoner in the castle and leaves when an alarm interrupts their exchange.
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