All the Colours of the Rainbow

So here are the coloured versions of my most recent doodles; both were done with a mixture of quink, inks and pastel pencils.

 'Alice' is pretty much done but I'm not happy with the second one.

The paper I used was far too thin and wrinkled up with the application of the ink. Other than that I just feel the colours are wrong...
I might try using some watercolours or acrylics on it instead; it just seems to have lost something that it had whilst it was still line work. But how do I keep the original essence of the sketch?