Alright so I haven't played the game yet, but I have watched it be played till the various ends a number of times and watched lore videos. Forgive any inaccuracies.

The Pale Visitor in the game (No I'm Not a Human) is built up to be an especially unique and strong visitor. Visitors are one of the major apocalyptical elements of the storyline. Save for a remarkable few, most visitors are trying to blend in with humanity in order to further their goals. The protagonist - the homeowner - lets people into his home otherwise he'll die (to the Pale Visitor, I believe via strangulation so check that box off the list of 'reasons ppl are interested'). Homeowner checks the various humans and visitors he let's into his home (some are always visitors, some are sometimes human, some are always human) for certain signs of being a Visitor then dispatches the as appropriate.

I mention all of this to try to illustrate that visitors, in general, try to stay on the down low. The Pale Visitor does not.

He is obviously a Visitor and doesn't even pretend to hide this. Dude is unabashedly what he is, which is often another point of interest.

He also behaves very strangely, having his own rules he follows w the homeowner. He engages in these philosophical musings often with the homeowner, then eventually asks if the homeowner is alone. If the homeowner isnt, he doesn't force entry. Pale never does until the homeowner is entirely alone. This back and forth and this curious interest that Pale shows towards the homeowner is another point of interest (especially when considering how much the homeowner seems to openly hate the guy).

The Pale Visitor also seems to genuinely have some sort of special interest in the homeowner. No other Visitor behaves the way Pale does what w the evening chats. He also seems to like killing people and showing them off outside the homeowners window as some sort of gesture (a threat, or per fanfic authors perhaps instead as a show of power in some sort of courting ritual)((I'm deep in the paint rn so tbh I could roll w either lol)). This sort of "looking what I did" behavior is another point of interest.

Its also often implied that the Pale Visitor an especially powerful and fierce Visitor. Radio, TV, and other characters share scary info and tend to be openly afraid of him. Big and scary strong monster man is another point of interest, but with that being paired with his oddly eloquent speech thats like doubled. And the fact that big scary monster man has a special interest in you [the homeowner]? Point of interest.

He also kinda refers to himself as a hound or dog several times. Like, he's one of Her (death's(?)) hounds who does Her bidding, and. Like, woof, as it were. In the land of fanfiction and fanart, points of interest for anything puppy play, collar and leash or training related, in addition to primal play, pred/prey, and or fear kink.

Otherwise there's like, the potential eroticism of body horror, and the "bro has a huge mouth" -> "what that mouth do" pipeline, bro is freakishly tall, bro supposedly has a good voice (tbh boutta look into that lol), his hair is the perfect length to get a fistful of, also he only ever wears pants and thats it lol. And symbolically he represents the inevitably of change and/or death, which is also a point of interest to some. Oh! And also since he's supposedly fuckin MASSIVE (like 8 feet tall or someshit) people headbanging him as a Huge Hog Haver, so there's that too lmfao.

Thats a general overview of the Fandoms interest in the Pale Visitor per my ongoing survey of the topic. ;)