Son Gokou
The spikes are very cool! Whether it's black or yellow, it's just cool. It gives the angst. The hair fits any costume that he wears.
Karma
I know she's a lesbian. Though, she always have me impressed by the way on how she evolved from her old hairstyle with black color. Nowadays, she is very experimental to her hair color. I've seen her having black, green, violet, bluish, pink, and now, I have seen her hair brownish....Karma's fashion sense is good also with the style that she applies to it. No matter if it's long or short, she's cool.