Well, I'll say you're not bad.
Your coloring is pretty good, but you might need to watch out for the lines (as when the pictures are zoomed in, I can see some outside of the line coloring!) and try to make everything more smooth.
Perspective is also a huge issue D: (I have problems when placing eyes on a face >_< Its pretty funny looking at my older works) You have to be careful when deciding where things go and how things look (I'm referring to the picture of May right now, just as an example).
For this particular picture, I have a few tips that myself and a few other friends use when drawing.
Since I can't post URLs yet (I don't have 15 posts, aww), I'll just say to plan your drawing first. Plot the basic shape using sticks and circles to where things go, and what pose you're going to use. (Circles = used for joints, like the elbow, shoulder, knees, etc.) Then fill everything in as you go (draw lines around the joints to fit everything in, then erase the lines you no longer need.. Of course draw the clothing on afterward. This works VERY well for drawing dresses and skirts, where the flow of the clothing is important).
For the face, I'd suggest using lines to help position everything. If you're drawing from a slightly sideways perspective, there should be a small grove in the cheek caused by the bone above the eye and lower cheek (to fit the eye or something like that). Draw two lines from the top and bottom of that grove to fit the eye, and carry those lines all the way across the face. Where the two lines end is where the ear will be placed. Next draw a line from the top of the head (if its from a sideways perspective, it wont be in the middle, but more toward the side that's facing away) to the chin.. Somewhere in the middle is where the nose will be placed.. You can also use this line to position the mouth.
You've got some potential I can see o: So keep workin' hard!