Ratthew comes off as paranoid but kind-hearted. He seemingly has a lot of distrust that stems from past experiences. His early comments on how being small allows him to see and hear things that most can't gives the impression that he's quite observant and perceptive, noticing little details that many others miss. Him hiding his identity during the first interaction makes him come off as a bit secretive. He appears quite cautious, as he warns the player not to trust anyone, especially those carrying suitcases, and he later tells the player he has to go into hiding.
Speaking like a rat because he's a rat also a cute voice when he's speaking
is to warn players against trusting Doctor Harlow, evade the shadowy Animal Corporation, and expose the truth behind what happened to his missing twin sister, Rattina.
He warns players not to trust anyone in the hospital and actively tries to steer them away from blindly following authority. He seeks justice and answers regarding his sister Rattina, eventually giving the player a special key to uncover hidden facility secrets. He operates in secret and eventually flees because the Animal Corporation is actively hunting him down for knowing too much.
