So, I remember the guest would be stalking you and running away when it noticed that you saw it, but instead I had a bit of an idea for him, he'd walk around the town trying to find someone, and if he sees you, he would start chasing you at a slightly higher speed than the other neighbors, (ik that there's lore for the guest that after HG and HGP he limps on his I believe right leg but yeh) and the way you could tell he was close if you couldn't see him was the old chase theme would play, but if he was about a few in-game meters away, It would be theat particular chase theme but without the drums and bass, so just the NuhnuhnuhNUHNUHnuh part (if u know what I mean) and then if he's closer the drums would slowly kick in and when he's REALLY close the theme would be as intense as the shot where he trips over a coat hanger in the alpha 1 trailer, and if he saw you it could be the SN guest chase theme, and at day he's not completely absent, he sleeps in the burnt house next to the neighbors house in alpha 1 and 1.5 which I assumed was meant to be the guests home as it fitted him, he also would get angry if you went over there last time I did it, so he'd be sleeping on a pile of shoes, and in the game you'd need an item from the guest to progress further, but there's a code to his house a bit like his bedroom in alpha 1.5, but there's clues lying about his yard, as for the houses whereabouts, somewhere off the town map, where some citizens wouldn't dare to go to, like in the forest, and also he sleeps with a doll of himself maybe, that last part of him sleeping with a doll is up to you, also same with the entirety of this suggestion,
Cheers
Greenpete06