The only way you can see who rep's you is by buying VIP.
VIP costs $7 for 6 months, though you have to have already bought Toriprime which costs $10 for a year.
Vip includes:
- Upload (much) bigger avatars (Up to 150x150 pixels)
- Upload animated avatars
- Have more room in your signature
- Have a (bigger) picture in your signature (Up to 650x200 pixels)
- Upload animated signature images
- Allows a background image in your posts
- Access to a VIP board
- Allows you to use the reputation feature in Wibbles
- Allows you to see who rep'ed you
- Gives you the VIP achievement
- Allows you to style your profile page (color, images etc)
And everything toriprime already has.