Matthew Mango is a premade Sim who lives in Isla Paradiso, the neighborhood from The Sims 3: Island Paradise. He is a loner and lives in a small seaside home. He is unemployed at the start of the game and has 4 cooking skill points.
Though it is not stated, it could be assumed that Matthew is related to Maru Mango from Sunlit Tides, and Magnus Mango from Aurora Skies. This may also be further supported by his Insane trait. He is also barefoot.