They are very noisy, try comparing the tree to the stones.
You should use roughly the same method for the stones, drawing larger blobs that better defines the shape.
Also, your colors look kinda off to me. For the character sprites, try a warmer skin color.
The berserker is also quite hard to read.
The face of the ranger as well, her hair and pants are quite noisy too..
And her feet are angled really strange, which I think will look very odd when animated.
The goblins legs are too thin..
When I have the time I'll try doing some edits if you need