alxy.jpg
Alyx from Half-Life 2. She's super smart, a great partner, and never seems to run out of ammo (at least so far in the game I'm playing XD)

I also really like how she's like, dressed appropriately for what she needs to get done (e.g. kicking butt, hacking systems, etc.) She is awesome for who she is, not what she looks like (although she's actually really pretty.)