Kirishima is a young man of average height with a rather muscular physique, he has red eyes along with a small scar just above his right eye. His hair is dyed red and commonly spiked upwards, with two little tufts of it appearing like horns. His teeth are shown to be consistently sharp. Originally, Kirishima's hair was black and reached just above his shoulders. His hero costume consists of two dark red, gear-shaped shoulder pads, a sash with a red "R" on it's centre.