Anonymous14: Doug Ratmann is a schizophrenic who used to work in Aperture Science and was the only survivor of GLaDOSs neurotoxin attack apart from Chell and Observation Room Guy(unimportant), and has several 'dens' full of drawings, bits and pieces and sometimes cameras. In one of these you can hear him blabbering through a wall and if this is slowed down he is actually saying things. As some of his drawings features Chell, it is believed he knew/knows her and it is speculated that he is related to her.
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