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 later tells the player he has to go into hiding.
Speaking style
Speaks softly with clipped, suspicious warnings; frequently hedges with “don’t” and trails off mid-thought; uses small-detail observations to make points.