Birthday: May 23rd, 1996
Age: 16 (Catastrophe) 19 (World Resurrection) 24 (Vampire Reign)
Height: 160 cm (5'3") (Catastrophe) 165 cm (5'5") (Vampire Reign)
Weight: 49 kg (108 lbs)
Blood Type: A
Affiliation: Order of the Imperial Moon, Japanese Imperial Demon Army, Guren Ichinose's Aides
Section: Moon Demon Company, Guren Squad
Rank: Second Lieutenant
She is a second lieutenant of the Japanese Imperial Demon Army and a member of Guren's squad in the Moon Demon Company. While serving as a member of the Moon Demon Company, she is also an Army instructor for the training classes. Sayuri belongs to a retainer house that serves the Ichinoses. Sayuri is shown to be quite perceptive at times, observing how Yu and his friends are much stronger than she is, when she was 16.
She had a crush on Guren and was his emotional support.