heh, interesting questions ma
'eylan. 
Will the AI keep on playing a role for the RP?
hmm, I'm gonna say that's a yes. Amie will most definitely continue to do something... but what I don't know yet. We'll see where she wants to go.
What happened to the woman that was with Drake?
I'm not sure yet, I think we'll find out in the next chapter... All I know is Alex made her way into my mind for a reason... she's not dead I can tell you that.
Did Drake have a twin brother that was designated to use the AVTR he is carrying? I know AVTR's are meant for one mind only unless they are identical twins.
No. Drake is an only child. He spent a great deal of time on an RDA recruitment base on Earth, and knows a great deal about the AVATAR program. He grew it himself for himself. I quote Norm and Jake and Max to show this can actually work:
Jake: "wow they got big..."
Norm: "yeah, they fully mature on the way out."
Max: "the idea of Stims seemed to work nice, great muscle tone"
This means that you can start and fully grow an AVATAR during the Five years twelve months and twenty two days. We're not exactly sure how it's done, but I would think that it's mostly automatic. Get some DNA of the Na'vi, and of the human in question. Gene splice. Put in Avatar tank. And away we go.
Drake wanted to come to Pandora to hide, what better way than to do that as a Na'vi? Or at least an Avatar. We'll see how it all plays out. I'm unsure if he'll even ever USE the Avatar, but it'll be there if I need it...
I don't want to spoil anything major. So I can't answer anything else. But every person I've implemented so far has a purpose. I won't forget anyone.
Thanks a lot Txura. Eywa ngahu.