OMG! LEAKED SCRIPT OF PORTAL 2 FROM KOMBO!
Here it is, what Chell's dad says in the beginning. (Or I've heard it's her dad)

Cave Johnson

Dialogue Samples

(Introducing himself over a loudspeaker to the Player)

Welcome, friend! I hope you enjoyed yer brief detention in the Relaxation Vault. Cave Johnson here, founder and CEO of Aperture Science -- the best damn applied sciences company on Earth. How good is the science here? Get a load a' this: I am dead! Now, yer probably askin' yourself, "Cave, come on now. How is this possible? Are you some manner of Dracula? Or Frankenstein? Or dependin' on yer cultural heritage, a Blackula or Latin Frankenstein? No sir! It's science. As of this mornin', yer old buddy Cave has been resurrected inside of a computer. And I never felt better!

You may also be askin', "Cave, where am I? When can I leave? Am I in danger?" Let me answer them questions, with a question. "Who is ready for a science adventure?" Yeah! I hope the answer is you! Because the test starts in three… Two… Go!

(Cave congratulates you on your success)
Masters level testing: Completed! Hell, crushed! You. Are. A. Genius.

(Cave contemplates the afterlife)
I been thinkin. Heck, suspended as I am in this inky purgatorium, I got nothin' to do but think. What if them engineers didn't do me no favors pourin' me into a computer? What if they denied me my final reward? Lemme tell ya about a fella. Lived thousands a years ago. Didn't want nothin' but fer folks to be a little bit nicer to each other. And in the end, he sacrificed himself to save us all. You know who I'm talking about: Hercules.

The man battled minotaurs! Medusas! Hell, he put the gods themselves in an arm bar. And for overcomin' all them trials? He got to go to Olympus. Damn it! I battled my monsters! Where's my Olympus? Unless… I haven't killed all my monsters… Anyway, this next test. Whoo… Yeah… Good luck with that…

Originally, Portal 2 was gonna be a prequel, having a CEO instead of an AI. They thought of a CEO named Cave Johnson. Then, they decided to have a sequel instead. Now, Johnson's gonna be an AI. I don't get it. GLaDOS (Genetic Lifeform and Disk Operating System) is "Still Alive". Why not use her? I guess they wanted a sequel because of Portal: Prelude. And (I started a sentence with "and") why is his name Cave? What does that stand for? Crappy Aperture...Vvvvvvvehicle...Ex-boyfriend of Superwoman?