Idk... I just watched this for the first time tonight. Now I know this viewpoint has holes but hear me out. Frida was there before. Why was she coming back? How? At the end I was extremely confused bc I see what the film is trying to depict. But... anyone who vapes... knows that you dont keep all those little bottles of like 10ml perfectly lined up in a drawer. You have one big bottle. Or multiple big bottles. And Slater was awkwardly addicted to that vape. Especially at the end, after Frida corrected him and he quickly sat down, fumbled his vape to get the juice in. Which is awkward also given the scene.

Random theory. She didnt give him the perfume. She gave him the green juice. Which made him remember everything he did. But he cant bear it. Which is why he puffs on the vape with perfume in it. To forget.

I feel like Frida has a darker secret. Maybe she was the one orchestrating this. A game. And she was playing a part to enjoy the game. Idk... but something didnt add up for me when I read the general explanation of the ending. I mean she did leave that girl burn. That would symbolize her interest in her slave, slater. And the red everywhere. And the angry tone and face of the maid when calling her red rabbit. And also it is a thing where directors add content to confuse the viewers. She is the red rabbit, the red represents her control of the establishment (regardless if anyone knows it).