You cannot. You are stuck with what you have chosen.
Your only option is to die, by flying into a sun or by having a faction (e.g. your own faction) execute you.
If you die, you must wait 3 weeks before you can make a new character.
Edit: oops sorry for the redundant post, happened almost simultanously.
Edited By: Hexx Harpy on Year 7 Day 132 1:50 ____________