Hmmm I have to say this very different than the rest of the fan art I've seen, in a good way of course. I like the unique use of colors and how they highlight certain aspects. If you ever happen to draw more fan art do post them, as I'd be very intrigued to see more of your repertoire in the future.
Lovely work. The middle one is my personal favorite; Shizune and Misha are juxtaposed well together and are well represented in terms of their relationship and demeanor.
Rule One: Avoid clichés.
I fear that I inadvertently break this rule often.
I had seen two of these somewhere else already and I was already impressed by the style and use of colors. Also, Misha has been rarely drawn with long hair but no drills <3 Keep drawing! You're really good at it already.
These are all really nice. I think I like Shizune and Misha's drawing the most because of its simplicity yet attention to detail, but they're all amazing beautiful drawings.