
That priest dude also got effected by the evil power. He got put in a daze and his body also kinda got paralysed.
They are currently in a separate room a bit far from the ball room which is very noisy there, so even if she scream, no one can hear a thing.
She don’t want to involve the two ladies inside the changes room, because they are normal person, they can be affected by the evil aura, well not as bad as how Yerenica body reaction, but they still can be affected.
And that maid is not simply being controlled…. The maid is dead already, that’s a zombie being controlled by evil power, the inside of it is filled with power stronger than normal human could be.

My theory is
I think it's because she was hiding the fact that she is weak to magic .. since people would use that and second she probably doesn't want to hurt or add burden to the Countess because they might get hurt...
We could clearly tell the one who is Confussed and talking asking people are the Countess
So they are safe probably the only safe plp out there in this havoc
The priest is weak because of the dark magic around probably eating his divine power and because raulus is summoned and beside Yeni that is why he is weak...

Hm… I don’t understand which part of my comment is rude…
I don’t even use any foul language or any sarcasm…
English is not my first language and I’m not that good at it, so perhaps the way I phrased my words came out as rude to you… then I would apologise for that….
However, I only mentioned that the reason why you talked about how MC should scream for help is because either you don’t understand the current situation of why she didn’t do that, because of how the translation is not good enough to give you a proper explanation, or perhaps because you missed the details of what you read.
As what have been shown, there doesn’t seems to be any people around the area where MC and these 3 people + ZombieMaid are currently at.
Priest dude does have holy power, but his power is not as strong as you think and it have limit.
If Erudian’s holy power strength is at 1000 and no limit, Priest dude holy power is only between 20-50.
The Priest also can run out of holy power if used continuously. He will need a rest and pray to refill the holy power.
Now, the villainess’s evil power assumed around 800-900 (since she can fight back but still lost to Erudian), you can say that she put in around 100-200 power into that ZombieMaid. That’s enough power to restrain the Priest dude power and body.
Now, the villainess seems to have prepared from day before by controlling some of the guards, that’s the reason why the ZombieMaid was able to get into the ball room.
And that also the reason why no one else is anywhere close to that changing room where MC and the 3 people are at.
Heck, the villainess can even freeze everyone in place like what you saw in that ball room (despite there’re some other priests there as well).
Now, let’s just say that MC has screamed, then the two ladies came out to help, what would happened to them would be some broken bones or death at worse.
These are noble ladies we talked about. Never do anything too physically active in their whole life. They don’t even bath by themselves, they mostly sit around, walk a bit, and socialising(which mostly just chatting).
What kind of strength would these weak ladies have to help MC break free from an evil power controlled ZombieMaid?
In this case, I think that MC decision is wise to reduce more victims.
Can we talk about how homegirl didn’t feel like asking for help when she was alone with the possessed maid? There were people EVERYWHERE that could help, including a dude that could probably overpower her before she tried anything
EDIT: Since everyone misunderstood me before: even if you’re fighting against a significantly stronger opponent, you still have a better chance with more people on your side. Although the maid didn’t feel pain, she could still be restrained. Not to mention, the priest thing was very confusing because of the translation