Grims are a strain of Chimera that are created from humans and other species through the Spinner strain. Although frail in form, Grims are fast moving and pose a serious threat when in groups. The Grim strain are the latest byproduct of the Chimera's conversion process and are created by using Spinners, which capture human hosts and are weaved in cocoons. The cocoon slowly rebuilds the host as they are converted into a Grim. A Grim has the appearance of a nude, sinewy Hybrid, lacking a cooling unit, and their spines appear to bulge out.