Wow. i like the effects you used in the wall, plus the chobit scan is cute as chobits itself.
i like your work, :P

the fonts... too simple but they're ok

First, I want to say that this is a good way and you've done a good job working with this kind of scan (which I find is a pain and why I think most people avoid these kind of scans).

Second, just as an artistic note here....when you are looking at things through water, the object bends because light is distorted. So the hair and fabric should be slightly warped to the right or left and should not match up with the lines above the water. A rough and simply way to do it would be to cut your scan at the water level, and slightly move that part to the left or right...and enlarge it slightly. It may look a little goofy at first, but you're looking through water afterall.