New characters for X!Gloop

This will probably go into scraps as it didn't turn out that great. I'm having trouble making the mental switch from drawing from reference to drawing from imagination, and back. Nevertheless, it's vital that I try because it's in drawing from imagination that I will apply what I've learned while drawing from reference. 
These are some characters that will appear in The Lives of X!Gloop when it returns. The boy on the right is the latest incarnation of Groy The Formerly Ancient Then The Very Young Then he Aged Back To Being Ancient But Now He's Young Again. The girl on the left and the woman in the middle haven't got names yet. They will be Xkolp, Ahaspar and the ooze creature's antagonists, in a way.
Done entirely within Autodesk Sketchbook in an attempt to develop a Photoshop-free workflow. I have nothing against Photoshop, and it's served me well but I don't want to be dependent on it. What I AM, however, dependent on is the bucket fill feature and I find that when I try to paint in colors, it takes forever and sucks. So that's something I'm gonna have to work on as well.