Webwisteria flowers are an excellent weapon against demons. The fourth episode of demon slayer: Kimetsu no yaiba introduces wisteria flowers and. Webshinobu primarily uses poison made with wisteria to battle demons, as she lacked the physical strength to behead them. To achieve this, her sword is shaped in such a way. Webaccording to the kimetsu no yaiba wiki, shinobu developed insect breathing after discovering she does not have the physical strength to slice off a demon's head. Webthere’s this beautiful scene in the douma vs. Shinobu/kanao/inosuke fight where shinobu becomes very upset with herself and her weapon. She hates her body for being so small. Webthe answer to why wisteria poison hasn't been distributed throughout the demon slayer corps was given in chapter 141 (albeit indirectly and in the viz version specifically). Webif they did they could kill demons if they manage to get a hit, even if they don't behead them. So why don't they use it if it would make demon…. Webthe same way multiple bites from an insect weaken the immune system due to the constant influx of certain parasites is how shinobu's application of wisteria. Webas seen in demon slayer, when zenitsu got poisoned by the spider demon (son), shinobu, with her unique antidote, saved the life of the former in an instant.