Brain (mole rat)

Brain is an intelligent albino mole rat with an enlarged brain, the brother of Keeng Ra'at.

Background
Brain is the leader of the renewal cult in the ghoul town of Gecko and seeks to take over the world. He lives in an underground cave adjacent to the Gecko nuclear reactor, loves cheezy poofs, and will ask to be given some if a visitor has any in their inventory as he can smell them. He seeks to build an alliance between Gecko and Vault City based on power from Gecko being sent to Vault City in exchange for medical research on how to "restore" the ghouls to humanity.

Appearances
Brain appears in Fallout 2.

Behind the scenes
According to Matt Norton, the goal of "renewal" is a cultural reference to Logan's Run.