Demon Slayer: a Ghost Who Wants to Make up for His Regrets

She is a ghost, but she holds a human sword. She knew the magic of vampirism, but she invented the bird's breath. Infinity train battle, She burns life, erupts mysteries, the phoenix sings and dawns, With one strike, three of the heads were chopped off! They are obviously the aliens who are being hunted. But in order to protect the dawn, he stood in front of everyone. Lan Yuke: "I'm not a monster, I just want to protect other people's autumn. " Time travel (the protagonist (female) forgets that she is a time traveler) + no system + growth type, not invincible