question: Which two characters have gone through a portal by themselves? answer: El and Pee paragraph: The film starts with a shot of a spaceship flying through space .  El , a crew member , walks through the corridors of the ship when he discovers the eponymous magic portal , a rectangular arch flashing with various colors .  Entering the portal , he is transported into a world of passageways .  Some LEGO creatures appear and build a small car for him to drive through the world of passages .  He then has a close encounter with a two-headed monster who chases him through the various paths of the mysterious world .  After El's car has a bump from a crossing train , the car falls apart .  El finds another portal , and nearly gets eaten by the monster , who ends up in the real world while chasing a leftover tyre from the devoured car and attacks Lindsay Fleay .  El reports his experiences to Captain Paranoia , but neither him nor his shipmate Pee believes him .  However , Captain Paranoia finds another Portal , Which takes him to a `` white expanse '' world , where a plasticine creature messes around with him , making him very annoyed and then flushs him out of the white colored world .  The plasticine creature then goes back through the portal Captain Paranoia came through .  The Captain then finds his way back to the ship , and tells El and Pee about what happened in the Portal .  El , Pee , Captain Paranoia and the Plasticine creature , go through the Portal , and find themselves in the real world , and get chased by liquid paper daleks .  The four escape the liquid paper daleks , Which are scared off by the two-headed monster that El had an encounter with earlier , in a shoe car . 