Greg and Lemon Brown are the major character in the story because we know that Greg wants to play on the basketball team and he has bad grades. We know that lemon brown is homeless he wears rags and he has a treasure.
Greg's dad and the thugs are minor character in the story because all we know is that Greg's dad is a post man and he give Greg advice about life. The thugs is to because all we know is that they want to take lemon brown treasure.
Lemon Brown wife, Jessie and the principal are the people mentions in the story because the text barely talks about them but we know that Jessie was in the army and he died in the war