The upper floors are where all of the clones of Lin that TheDevian created live.
Isn't he already in the not used room on the second floor?
Maybe Runey is hiding there and he is spying on the characters and he is secretly filming the characters to get the scenes. Maybe Lin and Android know that he is there, and they are secretly bringing him food and they are helping him with bugfixing.
Or maybe, did we saw MC's grandfather's grave? Or his dead body? No! We didn't saw him die, we didn't saw his dead body or his grave. We were just told that he died. But could it be a lie? Could it be possible that he faked his death, but he is still alive and hiding somewhere in the hotel? Maybe, he built himself a robot body or cryostasis machine to keep himself alive.
Or, maybe, he is really dead but he hid something in the hotel, something that could help us against our enemies?
Maybe Eyepatch elf knows something that we and Ellen and Android doesn't know.
Something strange is happening in our hotel. I think that I will need this: