How would one go about describing the main characters in To Sir, With Love?

Braithwaite is the central character of the narrative. 
His character can be seen as one striving to find meaning and not afraid to use his
freedom in order to do so.  Braithwaite is defined by his fluid understanding of the
world, and a resistance to settling in to a condition that he knows is not satisfying. 
His courage to embrace freedom as a form of innovation is not only what helps him find
happiness, but is what makes him an effective teacher.  Mr. Florian is the
representation of the evolved teacher, whos philosophy of understanding children in a
non- punitive setting is one that not only defines him as a headmaster but represents an
ideal that most teachers cannot reach.  His position and beliefs are a jarring shock to
Braithwaite's first experience with his students, who prove to him the need to formulate
his own philosophy before embracing others'.  Denham is a very strong force amongst the
students.  His leadership and unwillingness to be persuaded through superficiality is
what defines him.  Braithwaite learns quickly that he has to find a way to bring Denham
into his corner or simply move past him, as he will not be successful in challenging
him.  Pamela Dare is struggling to find meaning in her world.  She struggles with
finding attention from her mother and from Mr. Braithwaite, and while she is emotional
about this need to be validated, she understands what true commitment is and true
understanding of people through her revelations brought about by Braithwaite's
teaching.