has the single been to a vet for a wellness exam?
There could be something "off" with her making her be aggressive to the others to keep them away and them aggressive to her to keep her away.
That would be my first guess and thing to rule out before advancing to any more intro's and risk exposing any other gliders to something she may pass to them.
Then there are just some gliders that prefer to remain single for what ever reason.
I have a female that has tolerated some cage mates, and not tolerated others, including injured another female. She's only gotten along with one other female long term. She is currently by herself and very content to remain so providing I give her enough bracelets to satisfy her hoarding habit
I've done quite a few introductions here with my own gliders and other peoples gliders, using many different intro methods. Since her last cagemate passed I've done a couple soft intro's with her. She almost liked a neutered male for a minute then balled up. He was the last one I tried to put her with.
At that point she has made it very clear she prefers to be by herself and seems much more content than forced to live with a glider she doesn't fully accept.
I'm not one that follows the unrealistic belief that single gliders have to have cage mates. I believe the owner needs to know the glider well enough to recognize when the glider is telling you it wants to be single or telling you if it needs or wants a cage mate while also bearing in mind the safety of any cagemate youd select for the glider to live with.
She was my very first glider, I know her very well and I also know she is not above causing another glider injuries to get the glider gone from her cage. For the safety and well being of my other gliders I will not introduce them to her, unless she changes her mind and shows me she needs a cage mate, which I doubt will happen but we are always watching her behavior just in case.
So my advice..... move the cages farther apart, but keep them in the same room they will eventually be less territorial with each others presence but it takes time.
Figure out why the one cage has escapees and fix or replace the cage to prevent that from happening.
IF she has a clean bill of health and you DO continue trying to pair her up scent swap by swapping pouches between the cages. It will be difficult to only scent swap the neut male and her because he is in an established colony. So you can do some one on one with two separate bonding bags and the two gliders during the day to see if they will warm up to each other.
Don't rush things and if after all that she still shows that it's not what she wants listen to her.