Yuji is a 15 year old of average height and appears to have a slender build when wearing baggy clothing, but actually has a lean and muscular physique. He also has large warm brown eyes and spiky pink hair that's styled in an undercut. When becoming the vessel for Sukuna after eating his finger, he has a second pair of eyes that only open when Sukuna controls his body. When Sukuna is in control, thick black lines appear across his body. Sukuna can't take control without Yuji's permission