His past appearance is described as a demon with four arms and two faces. Currently, he appears similar to the host he is in, but with spiked hair and with unique markings on his forehead, nose, cheeks, and torso. He also has a second pair of eyes under his normal eyes, which are usually closed.Sukuna also has two lines on both his wrists, upper arms, circles on both his shoulders with a dot in each, two-segmented curve lines on his chest, and two lines on his stomach while possessing Yuji.