A childish dhampire orphan girl who gave Strauss refuge at her mountain home during his battle against the 49th Black Swan. Laetitia is only quarter vampire, being the child of a dhampire and a human. She later accompanies Strauss and becomes his charge and loyal companion. Unlike other dhampires, Laetitia has little magical or spiritual ability and relies more on firearms with bullets infused with Strauss' magic. While she is the weakest of the dhampires seen, she is still able to outfly a military helicopter. Laetitia acts as Strauss' eyes and ears when the vampire king cannot move about freely. She is also the only one who believes in Strauss even after learning from Bridget of Strauss’ betrayal. Bridget likes to refer to the girl as 'Mountain Cat'.
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