Actually, it looks great with minimal shading, though if you were to outline it with pure black, then it would hurt. Mantine! It's not often you see it alot.
Shading..hmm...It's kinda hard to explain because that's something you can learn from paying attention to daily life and paying attention to other people's works. It maybe hell, but soft shading is the easiest type of shading compared to cell (one color shading) since cell is only one or two shades while soft is many shades so it's easier to obtain a 3-D shape. It's a lame advice, but think the doodle as 3-D even though it was a 2-D doodle and just consider the lighting (From the right, to the top, dull light, bright light) and the shadings caused. (Heck, I can ramble more about shading but I'm not a crip XP;
There should be wrinkles on the unstetched, 'inner elbows', which are not drawn in (the wrinkles) and should be and there is where there should some shading on it, like 2 or more curved triangles heading down to the elbow. There should also be shading where the arm pits meets the top torso, because that is where the fabric 'colides'. The shading there kinda looks like alot of curved triangles joint up together by the flat standing part, if you know what I mean. The light source is very hard to tell, and you can't say there is a bright light as an excuse because other wise it would have lots of highlights on the skin and clothing.
Don't be afraid to show as much as of the hands as possible that you don't make the character OOC. Proportion wise, the elbow should be 'upper' and both parts of the arms were too long, consider that your elbow reaches your stomach if your arm was to your lap so logically, it's kinda abit too long.
I really like her pose, because it wasn't static or stale at all, her posture and pose is very natural and kinda tells me that she's the confident, semi-girly bratty type X) The Manine is very cute because his eyes are simple and 'care-free'.
Anyway, good work, keep on drawing; we need more 'XxSaberxX' written at the bottem of the topic link in the forums XD
Edit: Oh yes, even though her head is at 3/4 view, her farthest eye only toughes the face line a little, like just the eye lash or something. Anyway, its very common in anime for the nearest eye to be closer the ear, but since you draw smaller eyes, it should be abit farther apart from the ear :3