Imagine that if, instead of simply pouring Caroline's brain into that machine, they built it around her. With each new part/Core/what have you, Caroline became more unstable. After a time her mind completely broke and became the murderous AI we all know and love.

How you show it is up to you, anon.

* * Pre-Portal * *

They had knocked her out for the latest upgrade, or downgrade depending on your point of view. The woman noted that they had fixed the issue with her back, by replacing the vertebrae with a metal cord. She sighed. Wasn't it enough they made her look like someone with a bondage fetish?

The one scientist on guard looked up briefly before returning to his computer. She briefly glared at him before continuing her systems check.

'Another core?' The less than sane woman asked mentally. She had stopped speaking except beyond pre-recorded messages. This one was quiet at the moment. She would just have to wait and see what this one did.

* * Later * *

Douglas Rattmann was one of the few, if any others, who noticed Caroline becoming unstable. She had also started to refer herself as GLaDOS at times. He knew this was not a good sign. If Caroline went completely insane, or retreated into her own mind, what would happen? What would 'GLaDOS' be like?

He shook his head and looked away. It would only be a matter of time.

* * Later * *

A mask was the final straw for the woman. She fled to the depths of her mind, a place she hadn't been to in years.

* * GLaDOS * *

The AI chuckled as it flooded the room with neurotoxin. It couldn't believe how easily the Caroline had retreated and how easy it had been to kill the humans.

It watched as once again someone it the kill switch.

* * Portal * *

The AI watched the human run out of the last chamber. It was unconcerned. Several people had escaped the tracks and had quickly died from various reasons, withdrawal from the Adrenal Vapor, lack of food or sleep, misplacing a portal and many other reasons. This one would die like all of the others.

'He isn't dead.' The Caroline said. She had come out after several years, but hadn't tried to take over.

"The Ratman will die." GLaDOS replied.

The Caroline snorted. 'He's as clever as we are, it'll take a lot to kill him'

GLaDOS turned towards the door as it opened.

"Well, you found me." She said shortly. "Was it worth it?"

The Caroline laughed as she recognized the woman. She had been declared unfit for testing, far too stubborn.

GLaDOS was unconcerned until it felt its body being torn apart. It hissed as darkness fell.

'Well, it seems you can die.' The Caroline muttered before retreating once again.

No smut this time.

GLaDOS is a true AI with no self-gender identity, so GLaDOS here is an it, not a she.

Caroline is still in there, near the surface. GLaDOS is considers her something similar to the personality cores and calls her the Caroline similar to the way it would refer to the Morality Core.

The Ratman is Douglas Rattmann and seems to be very hard to kill all things considered.

So, yeah. Basically the GLaDOS construct was built around Caroline's body. The anon that put up this prompt was guessing by how GLaDOS' first head looked like it could be a mask.

Should we do a continuation to this?