as a human, he's very misunderstood and calls it as he sees it, but it doesn't seem to phase him how others think about him. he has a good wife and daughter that seem to love him very much. as a teacher, he doesn't seem that bad, apart from his constant harassment of schoolgirls
I can relate to his love of anime schoolgirls in their cute uniforms and swimsuits. I admire his honesty and I wish him success in all of his endeavors. I hope he has a happy life with his adorable wife.
He is just a general weird who acts creepy towards Kaori because it amuses him.