Sekiro, also known as the Wolf, is the main protagonist of Sekiro: Shadows Die Twice. He is a shinobi in service to Lord Kuro, the Divine Heir, and becomes central to the conflict over immortality and the Dragon's Heritage. After losing his left arm and being given a prosthetic by the Sculptor, he embarks on a dangerous journey through war-torn Ashina to protect Kuro and sever the chains of immortality. He is a silent, resilient warrior defined by loyalty, discipline, and relentless determination.