It's very possible Danny could have created Sir Noface.
We just named him No-Face because his expression never changes; that's all.
This way he might become more human and appealing.
She and the rest of the town convince themselves that McLeod is Chuck, despite Chuck's adamant denials.
But I do think there are people like him everywhere, people who want to glom on to someone but have no sense of self.
If paranormal activity is so common and predictable on the island then why didn't Chad investigate it himself for the film, rather than just trying to debunk another team's evidence? Personality No-Face is a lonely spirit who begins to follow after having developed an interest in her sincerity.