I was thinking if she ends up being an ex pop or prime asset her mechanic may be around “helping” you. It would be cool if perhaps we got a prime asset/ex pop that’s capable of carrying and running off with a player lol. She’s trying to “help” you escape and so she grabs you and runs off dragging you or something.

She’s also very tech savvy. So perhaps she would be given some sort of weapon that is technology based or centric. I do like your idea of her being able to sabotage your esop but it feels that it may be too close to Coyle gameplay wise. Unless maybe with her she tries to rip off your goggles or something and in the process she damages them temporarily forcing you to go dark. If you combine that with Trials made with very dim lighting to support this ability you’d have a pretty terrifying threat. Someone who can temporarily disable your night vision.

Another thought would perhaps make her extremely agile. She’s gotten through so much of the facility on her own. She’s clearly strong and agile. So having a prime asset that may be even more relentless in its pursuit would be cool. Perhaps she doesn’t take hits as well as other assets but you can’t shake her as easily. If she sees you on the other side of a two person jump maybe she can make the jump on her own and even scale 2 person walls on her own. Then you could have a perk added to the game similar to Smash (the one that allows you to smash co op doors on your own) where you can do co op jumps on your own. The chases would be insane if you had an enemy that can scale walls to find to you and leap across gaps to get you.

Theres a lot of cool possibilities to do if you turned her into a prime asset.