WHEATLEY

Wheatley, previously known as the Intelligence Dampening Sphere, is a personality core of masculine programming and English West Country accent who appears in the single-player campaign of Portal 2.

He guides Chell through her efforts in escaping the Aperture Science Enrichment Center. However, half-way through the game he and GLaDOS switch roles as she becomes Chell's deuteragonist and Wheatley becomes the game's main antagonist.