if you got raped by the arian brother hood or another group, you fukked. sure you can kill one but then you gotta deal with retaliation.
your only legit alternative is the snitch and ask to be put in protective custody. Yeah, you'll be labeled a snitch on top of a lady boy bytch but at least you'll be somewhat protected. Once you've been raped though you won't get no respect anywhere.
Or you could always just be a bytch to the original person who raped you. The worst that could happen is you'll get fukked on a regular basis and forced to give oral, not to mention you run the risk of getting sold to other inmates, but you will have some protection if you are a bytch to the right group.