 He is the son of a naagloshii father and a human mother, and can perfectly mimic any living creature once he has a sample of its blood, including retina patterns and some level of memories.Nicodemus is greatly embarrassed to learn that Harry has secretly hired Grey as protection during the theft, prior to meeting Nicodemus for this job.Grey works as a mercenary and takes jobs as part of what he calls "paying the Rent," charging Harry one dollar for his services while turning down a share of the diamonds stolen in the raid.