Maya Fey, from Ace Attorney. One of my absolute favorite females in any realm of reality ever, she's everything that makes a person perfect. She's playful, obsessive, manipulative (to a comical degree, and only to Phoenix, really), and loves a good burger. She's pretty, smart (enough), and overall wacky. And again, she loves burgers. How can I not love someone like her?
At the same time, though, her backstory's fairly tragic. Her mother left her when she was still really young and her entire village has been lauded and disgraced since an incident 15 years before the first game occurred. Her elder sister left the village (i.e. not the same as leaving her behind) and went on to become a lawyer, only for it to get said sister killed. Worse yet? She takes the blame for it. Later on, acting as Phoenix's assistant, it's nothing but complete and utter torture for her, being constantly put down and viewing herself as completely useless. She gets kidnapped, convicted of murder another time or two, placed in contempt of court, and overall has it rough all the way until Trials and Tribulations, until the games choose to make her no longer relevant. She has a lot of mental scars, yet she still puts on her biggest smile for her friends, and her innocent little cousin, and ends up being one of the most endearing characters in the entire franchise, before, during, and since.
She is THE girl I would marry from a fictional medium, and to me, she's just perfect, through and through. Some may find her annoying, some may see her as a nuisance, some may even want to see her offed entirely, but she will always be my favorite video game character of all time.