Who is the first of the pilgrims to join Harold on his walk in the novel, The Unlikely Pilgrimage of Harold Fry?

Wilf is the first of the pilgrims who joins Harold on his walk. He reminds Harold of David. He often steals things and is completely selfish and unreliable. He steals and drinks, but Harold finds himself standing up for Wilf because of the similarity to David. Wilf simply disappears one day and Harold never sees him again.