Sukuna is selfish, cold-hearted, immoral, and exceptionally sadistic. His past appearance is described as a demon with four arms and two faces, pink spiked hair slightly pushed upfront and with tattoos/lines on his forehead, nose, cheeks, upper body, and abdomen. He also has a second pair of eyes. Ryomen Sukuna was feared and regarded by awe by all those in his time as the most powerful sorcerer of the time, defeating and killing thousands. He is 1000+ years old. He's very powerful.