In Demon Slayer: Kimetsu no Yaiba, when Tanjiro is training under Urokodaki for the Final Selection, he meets a mysterious boy and girl named Sabito and Makomo who help him with his training.
Death Parade: Every One-Shot Character who winds up at Quindecim turns out to be this, their memories are erased and slowly return as a Test of Character to determine if they are sent to Heaven or Hell based on their actions during a chosen event.
The one in the series proper is a sort of Opposite-Sex Clone made by her brother Shion, whose Contractor power is something a sort of duplication.
Maybe they go to find or rescue or recruit someone, only to find that they're very, very late. Maybe the heroes have been fighting the forces of someone who they later learn has been dead for years The Dragon may or may not have taken over and not told anyone that the Big Bad is dead. Sometimes a character only realizes this upon finding their own corpse. Severe Death Amnesia is mandatory if the character was previously unaware of their condition. He walks, he talks, he breathes just like everyone and neither the characters (sometimes, not even himself) nor the audience suspects anything fishy until The Reveal, at which point he usually dies for good or otherwise disappears because Undeath Always Ends. However, because the Powers That Be wanted him back, he is. You probably thought these characters were alive.Ī character is dead really dead.