1-1.2. The bad leg could be a bit of a problem, yes. I mostly put that in there to cancel out the dhampir superpowers. Dhampir are stronger, faster, and so on than your average human. And I didn't want Anna to be little-miss-half-vampire-Sue. So she has about half the drawbacks of being a vampire, none of the benefits, and a whole NOTHER set of problems on top of that.
Benefits: A little more resilient to cuts, bruises, etc. than average. That's about it.
Drawbacks: Does, indeed, crave blood. Does NOT burn in sunlight, but has very weak eyes- sort of like a drow elf. Since her body is trying to behave as if it's alive and dead at the same time, her mitochondria don't really work properly and her immune system is shot. She gets tired EXTREMELY easily, picks up every disease that comes along the pike, and generally is (physically) a HUGE liability. In the RP canon we had her in, she also dies young, because her body just can't take the strain anymore. Like, I think in our main storyline, she barely makes it to 30. And... I think it's definitely a challenge to her, because of all this crap.
The OTHER thing is, she's the kid of two RP characters. Prussia from Hetalia and a (female- NO mpreg kthxbai) vampire. You know the type. *sigh* It seemed like a good idea at the time. So that's the ooc explication for why.

2. Ooh, this is the hard one. >.> Lol. Here's what I've got... She's the daughter of PRUSSIA and the niece of GERMANY. Stubbornness, assertiveness, and such runs in the family as is. (They're nations, they're horribly stereotypical.) Anna is actually, by her (nuclear) family's standards, kind of shy and a wallflower... She had to learn to get loud FAST, or she got drowned out. Anna really wants people to take her seriously (a lot of smart girls do), and her odd appearance doesn't help. Since she's still fairly young (about 16), she thinks that being loud and assertive and such will HELP people take her seriously and think she's interesting and important. Her Uncle Luddy- That's Germany, for you Hetalia fans- also encouraged this, because he was sort of training her as a soldier. She really looks up to him... her dad's a bit crazy and unreliable, and her mum's even worse. Germany is at least stable, and normal, and sane... worryingly so, he's saner than Jeremy Clockson, but she likes the normalcy.

3. Moonracer = Her dad was a HUGE Transformers nut. Her older brother is named 'Megatron Fritz Beilschmidt'. If she was a little boy, she would have gotten named 'Starscream'. As is, Moonracer was the only female Transformer I could find in ten minutes of googling. It's not going to come up too much, she might allude to 'even MY real name's not that bad' at a particularly speshul Suename... UNLESS they get sent on a mission to a Transformers fic. Then she's going to die a little inside, the way that (say) Acacia dies a little inside when sent into a Borimir hatefic. She LOATHES Transformers with EVERY. FIBRE. OF HER BEING.

Forgot. Her fandoms:
Axis Powers Hetalia, sort of. She started out as a sort of side character from that fandom, and she's very... protective of the characters. Especially Germany, Prussia, and Old Fritz. She LOATHES Germancest and sporks it every chance she gets. 'Cos, you know, it's her DAD and her UNCLE.

The Neverending Story. This book was her childhood; she loves it to death. It was her favorite growing up, and, yes, she has a bit of a fangirl crush on Atreyu. More to the point, there's LOADS of bad Neverending Story fic out there that needs to be burned with fire.