What do you gather about Crocker-Harris from the play?

Crocker-Harris was a teacher who was the one who strictly follow his rules, regulations and principles. He was a person who believes in taking unbiased decisions in regard to his students and he is an emotionless person for his students so that he can treat everyone equally. He was not a sadist, but was strict towards his duties. He was strict towards his duties shows that when he arranged class even on the last of school.