Honestly, I will admit it was quite chilling. There were so many set ups for Rook to scare us (I was a scaredy cat and didn't do anything, but I was also too sympathetic to be rude to the creepy Rook... I know I will suffer stranger danger) but from what I saw in other videos and images I could tell there is more to Rook and his unsettling vibes.
He's such a curious character with a tragic feel to him, from what little we get from the VN it seems he wasn't getting the proper support he needed, and isolation only further exacerbated his problems. I have to say, I love how Rook was characterized! (Also how did he find out about MC's information, boy you could have employed those skills to find your package)
But I will say this, I was absolutely weak for Rook. Like, my caretaker instinct just flared up upon seeing Rook and I was like "You unsettling man, you terrify me but I must give you a bath and food". Still, great work with this one!