Indeed, Aron is one of the blandest PS III characters. Though this is probably due to nobody writing for him in the first place. So allow me to first give you credit for writing something for him and actually giving him a personality.
I like the direction you've taken him, for once not making him out to be quite the boldest third generation prince there is, instead making his main...thing being the problem of his heritage and how others see him for it. Plus, making him a bit of a techy is a good touch. I suppose someone has to fix the machines.
As for the story itself. It's nice to see a different take of the encounter between Miun and the others, since it didn't really go much further than "OMG orakio's sword! Bleh! Ack!" *dead* "Hey, let's take her claw because someone said so and ignore the fact she's been alone out here for 1000 years."
Plus, the fact that she * a machine, you'd think someone would try to fix her up while they're there. Alas, she was beyond help. But then, 1000 years in the desert will do that to you. You've done a good job of getting Aron's feelings for the situation across nicely as well.
Anyhoo, very nicely written in all. While I said to do more Sari and Ayn stuff, I'd urge you to carry on with this storyline as well. I'll need to elave a review for the showdown between Rulakir and Aron at some point. That one was pretty sweet.