Webtamayo was born on july 2nd, 1414 ad during japan's oei era (july 1394 through april 1428), 503 years before the main storyline. Shortly before she became a demon,. Webin the arc of infinity castle from kimetsu no yaiba, tamayo he maintained his rebellion against the demon king and was key to his defeat. She and shinobu kōcho. Webtamayo doesn’t only deal in demon medicine. She treats humans as well. In fact, yushiro was a fatally ill patient tamayo was treating, and she gave him the option. Webtamayo is a demon who lives in tokyo and is hiding from muzan, the demon king. She is also a doctor trained to assist demon slayers whenever injured or poisoned. Tamayo developed a potent medicinal concoction with the intention of halting the advancement of a demonic entity's destructive blood demon art. Webtamayo’s unwavering opposition to muzan stems from the profound suffering he has inflicted upon both humans and demons alike. Driven by her tragic past,. Webtamayo recognizes the potential for good within nezuko and actively collaborates with tanjiro and yushiro to research a cure for demonism. Her research plays a pivotal role. Webduring the infinity castle arc and sunrise countdown arc, tamayo joins forces with the demon slayer corps to create an elixir to give them the strength they need to take on.
