"The diamond-shaped crystals on its body expel air as cold as -240 degrees Fahrenheit, surrounding its enemies and encasing them in ice. It can instantly create a wall of ice to block an opponent's attack."
Amaura was restored from the Sail Fossil in The Restoration Investigation! under the ownership of Calem. When first restored, the scientist who restored her claimed that he found that Amaura didn't seem eager to battle or evolve. Calem often saw Amaura as one of his strongest Pokémon. Calem often compared her personalty to Lexi's, and agreed with Lexi when she revealed that she felt she and Calem had chosen the wrong fossils, as Lexi also restored a Fossil to get Tyrunt, who's personality mirrored Calem's.
Amaura was abandoned by Calem after he and Lexi had a fight which resulted in Calem walking out and leaving her as she didn't want to leave Tyrunt. Amaura seemed eager to battle after this, but was mostly left aside in favour of Lexi's Pokémon.
Amaura was officially given to Lexi by Calem after he saw the growth in Amaura, and Amaura seemingly not wanting to leave Lexi. In her care, Lexi began to use her more in battles.