Crocker-Harris was teacher of Taplow. According to Taplow he is a person who follow strict principles and a hard working person as he arranged a class even on the last day of school. He was unbiased to Taplow and gave him what he deserves to get as marks. He is a person who does not like to be liked by someone and he is totally feeling less with his students, being a strict person he was still favourite of Taplow as he is hard working and give his best towards his student. Taplow while talking to Frank about Crocker-Harris also said that he was not sadist but yeah he was strict.