I started with Demon Slayer, and after drawing the strongest character, I'm invincible!

Let the protagonist give other worlds a taste of the absolute ultimate shock! After Jiang Bubai died from overworking, he was bound to a system and sent to various worlds to collect energy to prolong his life. The system provided him with identities and roles, with the only requirement being that he couldn't go out of character (OOC) while using those identities. Looking at the white-haired, black-eye-patch character card on his interface, Jiang Bubai exclaimed, "Wow! I've finally escaped my unlucky streak and entered the lucky one!" This is 28 Enlightenment Points! Jiang Bubai could only think, "Invincibility—how lonely it is!" PS: Poor writing, everyone is out of character...