For real. Idk if it is intentional but, I love the concept that Leila became so cruel and inhuman in action, goals (greed) and personality, she's technically inhuman both in body and mind too. A kind of cruelty that leaks even if she put a show and pretend to be Yvonne. Having to use brainwash bc even if she replayed the same events a millions time (loops) this have the biggest plot armor + perfect disguise, she still has to resort to it because their six sense pick something is off with her.
Kinda like when we witnessed someone do something so cruel and cold (which happens endless times irl), the first thing we think of that person is that they're monsters even if appearance wise they look human.

I hate her but love her as a villain, she’s just so fucking creepy. N actually a good villain, plain evil too, I mean she- my bad THAT THING aint even human bro.