While "Demon Slayer's" gorgeous animation is no doubt a large part of its appeal, the show's dense lore is one of its strongest features. Take, for example, the Nichirin Swords' role in the show.

It’s here that Tanjiro learns some big clues about his Breathing techniques and sword. (Photo ... of Tanjiro’s black Nichirin Blade. Rengoku mentions that those with a black blade don ...

is the strongest Demon Slayer with unparalleled abilities and skills. Yoriichi can access the Transparent World, Selfless State, and has a Bright Red Nichirin Sword with high combat effectiveness.