Mari Fukitemono features solely in the 2022 film "Crayon Shin-chan: Otakebe! Kasukabe Yasei Ōkoku". As the founder and leader of the large Fukitemono Group conglomerate, she serves as the film's main antagonist.

She finances and spearheads the Kasukabe Wild Kingdom project, masquerading publicly as a major theme park development. The project's true purpose is the capture and exploitation of mononoke, powerful nature spirits inhabiting the area. Fukitemono views these spirits solely as a resource to be controlled and monetized, seeking to harness their energy for profit and personal power.

Demonstrating considerable authority and ruthlessness, she commands a private security force to capture mononoke and suppress opposition. Her actions are driven by greed and a desire for dominance through technology derived from the spirits.

Her character arc involves a relentless pursuit of the mononoke, culminating in a direct clash where she attempts to empower herself using captured spirits. This plan fails due to intervention by Shinnosuke and his allies, leading to her defeat. The film concludes with her ambitions thwarted and the project collapsing. Mari Fukitemono appears in no other official media outside this specific film.