Grayson convinced his brother chase he fucked a dog while in rut ( he lied) and traumatized him. Grayson in youth also pushed Chase down a chimney if I remember correctly and killed his bird and told him mourning it was weird. Grayson has been portrayed as a psycho in josh/chase story. There's more, he also told Keiths husband that he shouldn't fight really from Al's and to just enjoy it, and made fun of him for falling in love with Keith, he also treats a beta actress like a Fleshlight in another story. He isn't great but in the chase/Josh sorry he is legit portrayed as a psycho, he's the buegyman lol
Read this novel too, and he is a legitimate psychopath lol, parents knew and went about it the wrong way not really knowing how to handle a psychopathic child. It gets worse...
Spoiler!!!!
While young he also ;
- tried to kill his mom by making food that had detergent in it because he didn't believe that his mom had ageusia(unable to taste), which legitimately traumatized his father, who is still traumatized to this day.
-convinced his friend to attempt to murder thier baby sibling ( was saved by their parent)
And those are just the ones I remember

Yall for someone who missed all the other novels and manhwas, in shorts why joshua hates him and idk