Who is Matthew Parfit- in Goodnight Mr Tom?

In the novel "Goodnight Mister Tom" by Michelle Magorian, Matthew Parfit is one of the secondary characters. He is a shy, introverted boy who is evacuated from London to the countryside during World War II, along with the main character, Willie Beech. Matthew struggles to adapt to his new surroundings and develops a close bond with Willie and Mr. Tom.