Shinnosuke Kagami/Story

Kagami is one of the guardians of “Hell’s Gate”, a portal that allows demons and evil energy to seep through to the mortal plane humans call Earth. After residing over his position and finding (or so he thought) that the humans he protected were weak and inferior to himself, he decides to release the seal on the portal. Along with this, he goes on a horrific killing spree, murdering various warriors including Gaisei.

After five years of preparatory action to unseal the gate, including imprisoning his fellow guardian, Shigen Naoe, Shinnosuke is eventually found by Kaede, who has the latent power of the Seiryū. Kaede defeats him; humiliated by his defeat, Kagami is thrown into the depths of Hell’s Gate as eternal punishment. However, he is soon reincarnated in a new form to fulfill his role as a guardian, as the portal is being opened by another force. Kagami sets out to fulfill his destiny, and to seek atonement.

Okina mentors Kagami throughout the series, in an attempt to convince him against his views towards humans. As per his ending, not only had Okina succeeded, but Kagami even regained his faith towards humanity, participated in the sealing ritual and eventually became a father figure to Kotetsu after Shigen died during the sealing rites.

However, the latter part of his ending cinematic in The Last Blade 2 ends in a cryptic note, fast-forward to the present day, declaring ..or so it is hoped, folly would never march again, suggesting his prior grievance towards humans may have a valid reason after all.