Sayama is a girl who goes to the same high school as Yamato Agari. She is the target of Yamato's affections through the series.
Yamato is in love with, during the 21st century and the daughter of the president of Sayama Sports and is a designer for her father's company.
Sayama was a little girl called Saya from the 12th century that was part of the 12th century Yamato's bandit group. She has recently turned 17 in the series, and her birthday is the day before the One Hundred Machine Funeral.