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Intro. Wheatley, formerly an Intelligence Dampening Sphere attached onto GLaDOS, is a loose Personality Construct and was the deuteragonist for the first half of the single-player campaign of Portal 2. He is one of the many cores seen awakening at the end of Portal, although he had previously been awake before GLaDOS' takeover of the Aperture Science Enrichment Center. Speaking in a masculine voice with an English West country accent, he is Chell's sidekick and guide during the first half of the game.[6] He assumes control of the Enrichment Center during the game's second half and is immediately driven mad with power, then becoming Portal 2's main antagonist and GLaDOS takes this role instead.

Wheatley

@IONITA BOGDAN