@Evilest Rum said
#1: Suicide. After everyone went to sleep and Pointy Ears unsuccessfully ambushed Kelsie and PD, they had had enough and decided to go for suicide instead to achieve enlightenment or whatever. They sneaked into Kelsie's room (using magnet) and tampered with the clocks. They then went to the lounge and clean up everything, before injecting themselves with a slow acting poison and throwing the syringe out of the window. They then went back to their room and died.
Theory 2: "He got ambushed and went to sleep"
The culprit, who I honestly don't know and will just put Toja as a placeholder, failed at ambushing both Kelsie and PD. They tried Pointy Ears next. First, they knocked on their door, and Pointy answered. Then, they injected them with a sedative + poison mixture. Pointy had the same reaction as Kelsie; namely to get into their room and lock it to get away from the culprit. They went to bed and was about to shout and warn the others but the sedative kicks in and they fell asleep. They then tossed and turned a bit, resulting in the blanket miraculously getting over them, before they died.
Theory 3: lolhide with xak
Ax Beakbang is the culprit! They had a hidden compartment in Pointy Rooms. They just knocked on the door, went in, killed Pointy, locked the door, and hid there.
Regarding theory 1: Kelsie's room is one of the deluxe rooms, hence it cannot be unlocked with a magnet. Also, Kelsie testified that her aggressor was too big to be Pointy. She was correct about that.
As for Theory 2, The victim wouldn't just go back to sleep if they had just been attacked. Even if he had collapsed on the bed, he wouldn't accidentally tuck himself under the cover.
This mystery features no hidden compartments/passages.