http://rinoa.nu/rinoa/

The webmistress there will go in great detail on Rinoa's hairstyle:

"Rinoa has lots of bangs too, mostly on left side and their length is just below her eyebrows. On her left side there's lots of shaping starting from where her bangs end. On the right side, the shaping starts at a lower point. I suggest using gel and hairspray to keep hair in place and to use a blow dryer if you need more volume near the top.

Then there's the back half. This half is actually parted further from the middle than the front half. The parting starts two inches or so from her forehead and the rest of her hair is allowed to fall straight towards her back. The bottom of the hair has an inward flip, use a blow dryer with a brush, curling inwards to get that effect. Oh yeah, the hair is chopped straight across here, and the length ends just at her shoulderblades.

If you want to do the 'streaks' I suggest not getting it dyed at all. Hair mascara or spray in colors (with skill) is usually your best bet. I personally use a gold hair spray. Both are messy though, but I use the spray since it comes off easily with water and wont stain clothes. Rinoa has three streaks in the game's FMV on each side, but in all the commercial CG art and drawings I can clearly see her bangs have some streaks too. So if you're going to do this, just be creative and go with your own hair's um, flow!"