Questionable Questing

The ghosts in Danny Fenton are reflections. Their basically memories or unresolved emotions that still linger on and if extreme enough or somehow empowered they turn into a ghost. So they technically aren't people, but at the same time they have the memories and emotions of that dead person and it just becomes a ship of Theseus problem if they actually are that person or not.

The overlook is how powerful and bad a entity?

How does a Time Ghost work?

Abstract conceptual ghosts like that

One of the best fan theories I've seen is that the Time Ghost is made from one of the many incarnations of the Doctor from Doctor Who. But he could just as well represent all the complicated emotions millions of people have about time or regretting the past.

With the Overlook Hotel it's deliberately left ambiguous if it's alive or not. But what's known for sure, is that it was an incredibly popular destination in the past for a lot of presidents, governors, and a lot of important people. All of whom have brought in their baggage, so there's been a lot of murders, suicides, occult rituals, and Mafia hits done at this hotel.

Which has made a malicious force within

And all that negative energy and vengeful spirits have coalesce inside the walls and basically come alive into this one evil entity that's sole purpose is to drag more people into the hotel, to either kill themselves or other people thus trapping them inside. With even normal people being affected, but especially psychically powerful people like Danny since they can directly interact with the ghosts.

While as for Danny Fenton, his half dead status is really going to trigger the hotel because it's kind of like a spider. It wants to draw people in and keep them trapped, and someone it see's as already dead shouldn't be allowed to leave.

Question, what is Danny a Ghost of going off his Ghost half when it fused with Vlad and his ice powers? Learned from Ghost yeties

Who knows? lol. I'll be honest a lot of the plot holes in the setting can kind of be blamed on Butch Hartman, the creator. He's a pretty religious guy and he didn't like the idea of ghost not being able to go to heaven or hell, so he came up with a lot of complicated extra lore surrounding ghost not being the real person but also kind of is.

And that's why you and everyone else is pretty confused as to what exactly Ghost are and what is Danny.

Makes for interesting Ghosts

Yeah, but now we're sticking with the plot hole of what to do about Danny? Is he magic? Is he a scientific abomination? Is he alive or dead? What memories or experience make his ghost side? is it even separate from him?

I think he's more a Ghost as a conceptual spirit than a dead person

He can be whatever you want him to be to fit your story, considering how unclear lore is on it.

I really like the concept that all ghosts are victims of obsession since they were created from unresolved emotions or issues. WIth Danny suffering from this darker side of him, either a need for control or to protect the ones he loves no matter the cost, the more and more he uses his ghost side.

With maybe on a more meta side, his ghost side was created by the neglect he suffered from his parents because of their ghosts obsession.

Oh do expand

Well ghost are formed from unresolved issues from a former life. Not only is it their only memories, it's also their purpose, and they can't move on unless those issues are resolved. So it unknowingly guides every decision they make. Even if they deny it or try to pretend otherwise. With Danny definitely in the former and not the ladder.