What is the character trates of armpit in the beginning of the book Holes by Louis Sachar?

At the beginning of "Holes" by Louis Sachar, Armpit is portrayed as a socially awkward and somewhat insecure teenager. He has a strong sense of loyalty to his friends, particularly to Stanley Yelnats. Despite his tough exterior, he is sensitive and struggles with self-esteem issues, often feeling misunderstood by those around him. Armpit's unique nickname reflects both his awkwardness and his role as an outsider in the group.