A persona is a very personal thing. It took me a few years to come up with mine, so it may take some time to come up with just the right character, but going by your info here's my shot at it (crack knuckles.)
I'd go with a G3 in Kimono's pose. Light blue body with pink, black and red striped hair. Her symbol is of a constellation patterned like a phoenix in yellow and redish stars. Her name could be something like Hope Rising or Rising... something. You'll have to give it some thought.
Or (suggestion #2) an orange body with green, red and pink hair . Her symbols could be autumn leaves and musical notes swirling on a breeze. You could call her Autumn Song or Autumn Melody.
Good luck!