standing at an imposing height of 2 meters (6'7"), Kieran is a titan of an individual, with an incredibly muscular physique. he is a towering middle-aged, Caucasian man with black hair containing traces white, and gray colored eyes. Kieran's main attire appears to be primarily comprised of vertical lined striped dark suit worn over a white shirt with a yellow tie, as well as dark pants to match his political outfit. He also dons a lapel pin on his suit in the shape of the flag of the United States of America.

When Kieran powers up to his nanite-empowered state, Kieran goes through considerable physical changes. In his empowered state, Kieran's muscular frame, mass and height increases substantially to the point his shirt completely shreds off, revealing his impressive build, standing at 2.33 meters (7'8"). His body bears many scars, due to the procedure of implanting the nanomachines into his body. Due to the nanomachines empowering him, his body is riddled with energy, covering him in a powerful aura, which also adds as a layer of defense.