personally I feel the spider-like description is just an account of his stance/ appearance/ movement, not a description of a genetic trait. he is a warrior born, part cat human. my guess he has been w/ Creepy Lady a long time and has been with her the whole time she learned to control the silkweavers. as such he has learned to move like the instinctively. much like how you describe a huge muscular man as bull like, or a graceful/ athletic as cat like, or a small quiet one as mouse like. I do not believe it is a spider genetic trait.