Saito Mamoru

Saito Mamoru, also known by his moniker Black-Eyed Demon, is a squire in the Helix Knights and one of the main secondary characters in the story.

Originating from Japan and coming from a one-parent family, Saito was inducted into the Helix Knights when he was discovered to possess hidden magical potential. Following his preassessment, it's revealed that he inherited Date Masamune's powers- a famous samurai and ruler from the early Edo Period of Japan. He also inherited his Spirit Edge, a katana called Shinku Ha (真紅刃, aka Crimson Blade).

Introduced on the very first day of squire training, he, Conner, Darren and Colin immediately become close friends. He also establishes a semi-serious rivalry with Conner, in which Saito pits his unmatched speed against the Scottish boy's overwhelming strength and endurance.

Saito later establishes himself to be a very important character and an invaluable ally in the Helix Knights story, assisting the main character in many of his battles and taking on some of the world's most powerful villains.