Why don't you just have your friend take uber to LAX
I'm not sure how much the Uber cost would be from the Universal Studios area (staying at the Hilton there) and just feels like of "not classy" or something to just put her on an Uber at ~7:30am and sending her off to LAX...
It's an option that I can certainly ask her if she minds... she honestly might not care... but I don't know, it's just not the first thing I would think of doing...