There's really very little reason for her mind to be involved here.
She drifts away as best she can.
The door closes behind her without her intervention.
Her eyes open, and she regains control of her body, although she will find she cannot use it to leave the bathroom.
Maybe she will be allowed a long bath. It'll probably be more comfortable than trying anything else. (She does look in the cabinets after starting the water running to cover the sound. Just in case there's something useful.)
She hasn't been hurt yet. Maybe she's just going to be like this person's oversized doll, maybe they don't actually feel like torturing her per se. Not good. Not at all the worst thing.
She puts on something that might be a bathrobe - the fabric is very soft against her skin - and ties her hair back, and leaves the bathroom. From there she walks around a little, never bumping into anything or tripping, and finally sits down in a comfortable armchair.
Once settled, she is free again, except that she cannot open her eyes or get up out of the chair.
Bell tucks her feet under herself and leans on the wing of the chair. "What do you want?" she murmurs.
"You could've just said hi to me. I would've talked to you. I'm new here, I don't have many friends, you didn't have to kidnap me to get company."
"You could've closed my eyes and I would've been freaked out but you could've explained, you could've blindfolded me and had a moment to take my eyelids again if I turned out to insist on it," Shell Bell says. "You didn't have to put me in a box to get me not to look at you."
"I am not making up the fact that if you blindfolded me you'd be able to reassume control of my body before I could get the blindfold off. I'm not fast, or sneaky, or anything else I'd need to be to win a contest like that."
Anything she can do at this point relies on the fact that she is being allowed to talk. If she is going to get out through something other than the torturer spontaneously losing interest, it will be because she talks her way out, and doing that will rely on knowing who, exactly, she is dealing with.
"If it was something you wanted that I could give you that you'd rather not wait for me to guess. I know I can't make you let me go."