Valerie was assigned to work with Bekka on developing a cure for the transformations, but when it became apparent she was sabotaging the work in order to gain power over Angel City, she nearly killed Bekka and Zoey. Kettakett tricked her into drinking a transformation serum, and as penance for her crimes she was muzzled and given to Zoey as a mount. She turns into a phorusrhacos btw.