One popular Chainsaw Man hero was, surprisingly enough, inspired by a South Park character. One of the trademarks of Tatsuki Fujimoto’s writing style is how his stories will constantly make references to various Western media, most notably movies. Sometimes, this will only come out in small references like in a chapter title or someone just namedropping a movie or celebrity, but there are also many instances where something from a movie will be lifted wholesale for Fujimoto’s story such as a scene or an entire character model.

https://screenrant.com/chainsaw-man-hero-power-southpark-cartman-inspiration/