Muzan was ultimately defeated by the collective efforts of Tanjiro, Nezuko, and the other demon slayers. Their teamwork and perseverance were key to ending Muzan's reign of terror in the manga.
It could mean that I'm going to be something that haunts you, like a memorable or spooky experience that stays with you. Maybe it's a metaphor for leaving a lasting and somewhat eerie impression on you.
Well, muzan x reader fanfiction often explores a very interesting relationship. In such fanfictions, the writer usually dives deep into the dynamic between muzan, who is a complex and often dark character, and the reader - insert, which can be a very exciting exploration of power, mystery, and sometimes a touch of romance. It allows fans to put themselves in a fictional world with muzan and experience different scenarios.
To be your ghost story, I would first start by being unpredictable. I won't follow the normal patterns of behavior that you're used to. I might disappear for a while and then reappear suddenly. I'll also tell you some really strange and captivating stories that are so unique that they'll stick in your mind like a ghost story. And I'll use my body language and tone of voice to add to the overall 'ghostly' effect. For example, I could lower my voice when sharing something particularly mysterious, or give you a certain look that makes you wonder what I'm really thinking.
Transformation is another popular theme. It could be the reader - insert changing muzan, or the other way around. Maybe the reader - insert is transformed into a being like muzan, or muzan starts to change his ways due to the influence of the reader - insert. These themes add depth and intrigue to the muzan x reader fanfiction.