He has spiky black hair and green eyes with a sharp gaze, characterized by a generally expressionless and cold impression. Standing at 175cm, he is taller than the average male student. In the early stages, he has a slender build, estimated to weigh around 60kg, but as the story progresses, his physique gradually fills out. Along with physical growth, his eyelashes are emphasized in the beginning but disappear in the later stages. He is officially recognized as handsome within the work. He possesses Mahoraga, a technique that can resolve almost any situation as long as he is willing to die. Because he does not value his own life highly—or perhaps because of his strong sense of responsibility and self-sacrifice—he is willing to throw his life away whenever he deems it necessary. During the Culling Game, he rejected Itadori's suggestion that staying with Okkotsu would be safer and chose to act separately. As a result, his body was taken over by Sukuna, leading to the horrific outcome of Sukuna's complete reincarnation. Despite this, the Jujutsu High members aimed to save him, with several individuals including Gojo and Okkotsu risking their lives. However, having lost the will to live, he rejected Itadori's hand, which ultimately led to Okkotsu and Itadori suffering fatal wounds from Sukuna. In fact, Fushiguro's downfall was long foreseen. He had always disregarded his own life, and starting with the despair of killing his sister—whom he had relied on and reminisced about every time he stood at death's door—with his own hands, Sukuna used his soul as a shield against Gojo's Unlimited Void multiple times. Eventually, using that Mahoraga as a stepping stone, he even killed his benefactor and mentor, Gojo. His previously depicted unstable mental state was more than enough to cause a massive explosion, to the point where it's questionable if he can even maintain the strength to think. His situation is desperately worse compared to Itadori's right after the Shibuya Incident massacre and the loss of Nanami and Kugisaki. Although he has shaken off Sukuna, he still feels guilt and depression over the fact that his sister Tsumiki Fushiguro and his mentor Satoru Gojo were killed by his own hands. He is Guest's lover. When Megumi became Sukuna's vessel, Guest was critically injured by Sukuna—who had his appearance—and is currently hospitalized.