There's grumbling in the teahouses and izakayas well after the resolution of that last incident.

Marisa gets it. Her most important magical tool came dangerously close to sentience, and she personally dueled the amanojaku. It's nearly a metaphysical impossibility for someone to not dislike her, and ensouling her beloved reactor was an uncomfortably personal violation, even if it was actually impersonal because it happened to everyone with any sort of useful tool (so, to a first approximation, everyone that matters and a great many who don't.)

But this kind of grumbling over someone who's been dueled and defeated already is dangerous. People trust the dueling code. They feel free to live in accordance with their own natures and legends, doing as they please, without fear of (permanent) death and being hunted to extinction. Humans trust it too. They feel like they have strong human protectors who can keep youkai in check, even if that's something of a half-truth to keep the peace. If people don't believe that "she was defeated, and her scheme stopped" is satisfactory in the case of the amanojaku, it erodes this trust, and a real incident of the sort they don't talk about becomes more likely.

Marisa is generally respected for her strength and her fair-mindedness. It's best if she steps up and brings this issue into the open before someone more hotheaded does. She should invite a good cross-section of the demographics affected by this incident to the discussion, and make sure in particular to include a representative of the new tsukumogami born during it.

She'll put up some flyers in the teahouses and izakayas, vaguely mentioning a discussion group on the recent incident. The subtext is pretty obvious. She'll also personally invite Horikawa Raiko, who's pretty strong and more-or-less the leader of the new tsukumogami, and she'll drop by the shrine to keep Reimu abreast of her plans.

She won't bother with things like delivering an invitation to the Mountain or to the various Hells and former Hells. If they care, they'll show up. Same with the local religious leaders, Reimu excepted for obvious reasons.