It would have to be Merill (Or whatever she was called) from DA2. (Yeah, yeah I know. I hated it as a sequel, so I called it Kirkwall Advertures and was able to enjoy it) She was actually stupid about something. She didn't have daddy issues that, er, Shepards "daddy" would fix, she was fairly reserved, she didn't have a rack that meant if she tried to move her spine would have compressed to a singularity and she was actually stupid about the whole mirror thing. I found myself yelling (in my brain, of course.) for her to just listen to the people more experienced who care about her to not do it. But she did. She made a realistic mistake, like, y'know, real people do. I hated the fact that I couldn't talk her out of it, since I'm Hawke, and the whole game sets you up to be the problem guy - But from a character perspective, she was great.
Though quite why her underwear when she stayed at your house looked like oblivion elven platemail, I'll never know. I would have rather had her wearing one of Hawkes massive "I'm with the champion" shirts. Or like, her clothes. It just made me think of an oblivion face on her.