4th wall breaking: Feel free, though Chloe is pretty skeptical when it comes to most things, even with proof. If you say she's from a video game, she'll say you're crazy.
Threadjacking: A-OK!
Backtagging: Into forever
Mind reading: Sure thing.
Location sensing: She's a human. She's just a human. If you can track humans you can track her.
Telepathy: Also good.
Special/ magical items: As long as there's a bit of warning first if she'd be directly affected by them, sure!

( The rest is behind the cut! )