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Interesting attribute of the tale is how little input and weight Manji adds to the story. Manji just hangs along with few desires of his own, but it is Rin's journey, Rin's growth, Rin's revenge. And Manji's immortality empowers Rin and allows her to continue.

(I'm going to post my review of 2019 "Blade of the immortal" in few days.)

Here is my mini-review: @onlyjob/mugen-no-juunin-immortal-immortal