The colors blend together nicely in this piece. The contrast between warm at the top and the cool blues and violets keep your eye moving throughout the image itself. The composition is a bit front and center, but the splashes around the sides keep it moving, and make it less harsh in that sense. I think that the values could have been pushed a bit more in the hair to make the face pop even more. To me, the eyes are definitely your focal point, so darkening the hair a bit more on the left side of the face would most likely help draw the eye up and around to that point. All in all, this is beautiful and very well done!
I'm certainly not an expert on pen, ink and watercolor work, and I love your art and technique. This piece has great balance and color distribution and use - except one area seems distracting and that is the upper right forehead which is stark white and draws my eye away from the focal point.
Otherwise, I salivate over your use of color and the way you successfully combine those colors to represent light and shading as well as vivid explosions of energy and an almost whimsical dance of brushwork on the paper. It makes me feel like I am part of the freedom of its movement.