Grunt is a tank-bred genetically engineered super-krogan that can be recruited as a squad member. Grunt's design is intended to be youthful but also tough, invoking the look of a linebacker with large shoulder pads and exposed muscular arms. Compared to Wrex who is a much older krogan, Grunt's crest is smaller and does not fully cover his entire skull due to his age. Early designs for Grunt's armor varied widely, which eventually settled into a polished and sleek look, almost like a "show-room finish" on a brand new car.