I'm not much on anime, so I have little to choose from. I have the perfect character, unfortunately I intend to use it in a signature, and so for now it's just a work in progress which I don't want to unveil until it's finished.
I originally thought of Faye Valentine from Cowboy Bebop, but I'm more a blend of Faye, Spike, and Ed all put together.
If Super Sentai tokusatsu are allowed, I might be Zonnette of Carranger...
Though if I only picked one based on similarities of temperament, I'd probably have to go with Rei Ayanami.