I wanna throw out some headcanons on some of the Creepypasta's.
!!"YOU" is used as a general statement! It could be a proxy or a reader!!
-Slenderman is really chill. He's understanding of your problems, would definitely try to help. Slender would give advice to a problem if there's one between you and family, you and another proxy, or you're just not okay.
-He's a guy who like books. A lot. When he doesn't have to do any work, like give out missions, paperwork, etc, he goes to the library and finds a book to read. Obviously a book he would enjoy.
-Like I said before, he's chill and understanding. He's kind and does kind gestures to others if he feels it's a good time or he wants to.
-for the love of the stars, please don't make him angry. You'll very much regret it.
-just for the record, not easily angered
-I don't know how this is possible but I feel like since Jack was "sacrificed" in a satanic cult and despite his eyes being scooped out, he's still somehow be able to see. Maybe when it actually happened and after effects, it was like his eyes never came out of their sockets. Probably something that heightened his senses and even if he could still see, it's really blurry from the blackness falling from his eyes.
-The black liquid on his mask was painted as if to represent the blackness that fell from his eyes and that there were holes in the mask to be able to see. I don't think the mask would be thick or really thin, but somewhere in-between.
-he's bisexual/biromantic
-EJ is another guy who is really understanding. He may not know how to respond all the time, but certainly is there to listen and try to help you relax.
-He uses his doctor's degree as a way to help the others get patched up/treat their wounds. Jack would get medications that would help your physical or mental illness.
-He'd have a degree in psychology and physiology
-He is easily paranoid and has audible hallucinations and suffers from mild delusions (coming from someone who has psychosis)
-Same thing as Slender: don't make him mad/anger him
-thanks to his paranoia, he's usually a little irritated and it makes him easily angered (personal experiences)
-someone who smokes on the rare occasion, not one to usually do it.
-not much a drinker. His favorite kind of drinks would more so be energy drinks
-demisexual and panromantic (more leaning on enby's or men)
-skilled with a gun and crowbar
-understanding of other's needs and slightly empathetic. Mostly doesn't care but will care if you're close to him
-he's a very good and close friend with Hoodie/Brian Thomas
-not very easily angered but he's one of the more rational people when he is infuriated
-skilled with a gun, not so much short range weapons but obviously long range weapons
-unable to empathize because he's not entirely sure how to.
-smokes/alcohol on the rare occasion
-like Masky, reasonable when angry but not easily angered
This took about an hour to write thanks to some distractions but I did it. And the favoritism is strong lol.