Ayaka Sajyou is a magus living in Fuyuki City attending school at Homurahara Academy. She is also a former student of the El-Melloi Classroom, having attended classes for about a month.

In Fate/Prototype:

She’s the Master of Saber in the Second Tokyo Holy Grail War.

In Fate/strange Fake:

She's the "True" Master of Saber in the True and False Holy Grail Wars. Ayaka is recognized by Thia Escardos as a non-human being.