Age: 15-16 (immortal)
Height: 165 cm
Weight: 55 kg
Classification: Mystes,
Title: World-Converting Ascetic
Yuuji, the main male protagonist of the story, is just an average high school student. However, his world is turned upside down when he discovers that he is already dead and does not have much time before he disappears. Fortunately, Yuuji is a Mystes who contains a treasure known as the "Reiji Maigo" (零時迷子, Midnight Lost Child). The treasure inside him restores his Power of Existence every night at midnight. With the Reiji Maigo, Yuuji has the possibility to live on like an average human as long as he makes sure that his Power of Existence does not run out before midnight. Later, he begins to learn to use the yet untapped potential of the treasure kept within him. He cares deeply about Shana, but does not make any advances in their relationship due to his feelings of depreciation as a Torch and viewing Shana as someone who is beyond his reach. He also starts to see Shana from her old former perspective of the world, where he is just a Torch and she is just a Flame Haze. With this going on, he distanced himself from the closeness that the two originally shared previously.

Yuuji is kind person who puts others before himself. This often draws much confusion and annoyance from Shana, as prior torches from Shana's experience exhibited selfish attitudes. However, Yuuji's compassion and empathy sow the seeds of attraction between him and Shana. He accepts his fate with no ill feelings, a trait which surprised the Flame-Haired Burning-Eyed Hunter, knowing that most Torches would be depressed to the point that they would even commit suicide before their existence wears off. In fact, Yuuji uses this fate to commit acts of heroism, defended by the belief that even if his existence would one day disappear, his sacrifice would be proof that he had once lived.

Despite all these changes, he still struggles to live the ordinary life he once had and at the same time, trying to help Shana in her battles and save Misaki City and its inhabitants.