Aye so last chapter talked about Fiend's backstory and how he (could) behave(s), so this chapter is more dedicated to how his body works and shiz

-Fiend can unhinge his jaw
-I'm serious
-The spikes on fiend's shoulders are for defense and intimidation
-Fiend has low resistance to temperature and can get damaged easily
-He looks like a corpse because (H̶e̶ ̶d̶o̶e̶s̶n̶'̶t̶ ̶k̶n̶o̶w̶ ̶h̶o̶w̶ ̶t̶o̶ ̶p̶u̶t̶ ̶o̶n̶ ̶m̶a̶k̶e̶u̶p̶) the experiments made his skin and muscle rot and harden
-He smells like black licorice and no one knows why
-fiend prefers liquid or small food due to his fucked up teeth
- He has a long tongue :)))
-he has a nice butt (this isn't a headcanon, it's fact)
-his uh armor can regenerate. Even though it's made of dead skin and muscle, his cells underneath that armor are alive and can sense when damage has been done in order to fix it. Then they die when the damage in the armor has been fixed, making it look like nothing has happened
-Fiend can touch the ground if he wanted to but he can't do anything on the floor because he doesn't have fucking feet
-no part of his skin is soft, everything is hard ;)
-his eyes are black and scary because they're an illusion caused by Fiend to make them look like that, no one knows what his real eyes look like
-Fiend can over use his powers which can cause his body to slightly deteriorate
-hot water hurts him on a major level and so does cold water so Fiend has to constantly be careful
-his head is huge because his brain is huge
-his neck is really strong (because of his big ass head) so good luck trying to snap it
-other than his neck, he's hella weak in a physical sense, if he didn't have his powers, the player could easily kill Fiend