Thank you for your help, I'll fix those errors in the next update (eh, I'm always overusing "that" 😅)
Exactly. The kid's nature also varies depending on your choices, specifically based on the way you treat him (if you are mean to him, he is a human "disguised" as a monster; otherwise, he is a real monster)
The Mc on the other hand is human if you choose to cook the meat and pick the less "bold" choices, or an alien monster if you eat the meat raw and act as if you're not afraid.
So, if you play as a monster, in ending 5 your hand is definitely less human and in ending 1 (or 2) you get a glimpse of your monstrous body :)