Saber

They’re the Saber-class Servant summoned by Miyamoto Iori in Fate/Samurai Remnant.
A Servant of the Saber class who is dressed in an old-fashioned style and wields a wavy sword. Saber suddenly appeared in front of Iori and saved him from a crisis. Claiming that Iori is weak, this proud Heroic Spirit intends to fight the Waxing Moon Ritual alone. Saber seems to be interested in the peaceful streets of Edo.