Chipped Petra, or known as P.A.M.A.-controlled Petra, acts fully opposite of Petra. First of all, she has red eyes, and second of all, she listens to what P.A.M.A. says. If you unchip her later in Episode 7 (Access Denied), then she will go back to normal. If you unchip Lukas instead, you will have to face her in P.A.M.A.'s body.

(please note that this is not from the Internet)

Mr. Creeper <3