Sai has a blur tool.
Though I like it better than photoshops because it's more natural looking. At least to me.
Now on to the art! I like the over all picture, it's cute. :'D Though there is one thing, she doesn't have any eyebrows! D:
As far as the coloring goes I'd suggest when it comes to the hair using more than two colors for the hair. Try using two different shades. Think of real hair when you are doing it. XP The eyes and the expression are really cute though. Over all I really like it! : )
Lol blur tool equals water tool with transparant color.