Allegra is a female Valorian. She was found on a refuge ship by Prime. Instead of shooting plasma blasts from their hands like the men do, she has the ability to stretch her form and turn indestructible. She has silver skin and is Jack's best friend. It is believed Jack and Allegra could possibly have romantic feelings for each other. Allegra is afraid and shy in the first book because of her past with the Rustov. She is much more courageous in the second book. In the Third book she is infected by the Rustov but is saved by Jack.