I just love how the teacher handled Haruna's emotional moment, and his final monologue about humans. He really understands them, even the parts he hates. It's like he accepts people for who they are, flaws and all, and that's why he's such a great teacher, you know? It really shows his growth too, compared to how he was at the start of the series. He's still a misanthrope, but in a much more understanding way.