Opti and Pesi are characters from the final part of Exp 8: Rebellion of the Exps. They are two personalities, trapped in one body, only able to surface when they use more will power than the current host. Opti is sunny, happy go lucky and loves bunnies more than anything (though he loves all life. Pesi is dreary, angry, spiteful and hates all life. The only thing these two agree on is that the other must be exterminated. Which personality will emerge victorious?