Heart-Seers are people with the power to read the hidden thoughts of others in Vagrant Story. When somebody is hiding their thoughts, a Heart-Seer creates a shadow version of that person that only they can see. The shadow then speaks the person's hidden secrets. Only one character, Callo Merlose, is shown to be a Heart-Seer, and she gains the power through the influence of the city of evil, Leá Monde. Sydney Losstarot also has the power to read minds, though he is never shown to be a Heart-Seer.

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