I actually haven't been practicing at all! But I've gotten a lot more used to the tablet and changing some settings around in sai made it much easier to get nice neat lines and such! Hardest piece is the center panel, the perspective pieces are still the hardest. But I cheated and had a friend help out with perspectives and such. >_>
And yes it's a NINJA TEWI. Why? So Sanaeaki can do Reisen x Tewi tentacle refreshing page later...
And I actually never read soul eater, so don't know which faces you're talking about. :D