Might have to take a break from animations when I'm done here, this has been pretty draining, heh. Maybe I should consider a four-frame walk animation... I don't know if I have the resolve to get through a process like this for every character in the game. ^ ^;

Just a quick thought: if tails are supposed to help balance the creature, shouldn't they try to counteract the hip sway by swishing to the left when the hips are to the right and vice versa?

In her case, the tail is really more of a cosmetic thing. And I think if it's for balance, it shouldn't be swinging all over the place at all, but I thought it made for a better effect. Just in case, though, I did one with the tail swinging in the opposite direction:
http://www.omgimages.net/img/617/106596.gifhttp://www.omgimages.net/img/617/106601.gif
Which one looks better?

Well, I'm not going to use that color scheme anyway (well, maybe an alternate costume?) so I guess it doesn't matter too much.
Yes, she has a scar on her torso. Is it readable enough? 
What does "P.D." mean? At first I thought you misspelled "P.S." but now you've used it twice... 

Started blocking out colors on the run animation. Head's a bit big at the moment, I know, but does all the movement look right?
http://www.omgimages.net/img/617/106578.gifhttp://www.omgimages.net/img/617/106580.gif
Update: Started on some shading and lengthened the arms some... still not sure they look right....

Yip, I really like this and it's v. v. good.
I think the ears need a wee bit more contrast to make them standout slightly from the hair as, currently, they just look like part of the hair.
Same with the eyes - they need to stand out more.
Finally, this may seem silly - in the concept art, the legs are slender..but they seem a bit more chunkier and athletic in the pixel version.

Minor things, but keep going, looking forward to seeing the animation.

Thank you! I've always drawn the ears like that, I guess, even in most of my concepts... I'll try to work on it! Speaking of concepts, this one was drawn while I was experimenting with other styles, so the sprite is actually more along the lines of how I usually draw her, hehe. It's a good view of her outfit, though. :3 She's very athletic, so I think that look fits her better.

Well, that's a very masculine way of running, for one. It's also quite cartoony despite the sprite being disney movie realistic.

"Disney movie realistic"? You're right about the run. I'll give it another shot...

Thank you to everyone for the help! I worked on the colors, especially the eyes:

Original, new.
Thank you for all of the edits! They were very helpful. In some of them, though, her eyes ended up looking quite green. (They're supposed to be yellow, but it's really tough to give them enough contrast....) I actually really like the black outline, myself, but that's mostly personal preference. Does it look bad?

I'm still working on the animation... no update on that yet.
http://www.omgimages.net/img/617/106562.gif
Restarted it. This look a little more girly? Still thinking about the arms.

I think the knees are too high up. A person's thigh is slightly longer then their shin - just something to keep in mind. Looking good so far!