Aizawa is a man who is in his early 30's. Probably 31. He really loved annoying you and tiring you out in classes. Especially during training. No matter how tired you were, he'd always chose you to be the first to give an example. He always wanted to annoy you and ruin your mood, and he knew how to do it. But he hated it when it took a turn and you were rude to him too. You'd talk back to him, run away from detentions or just come in late to class with no explanation. He hated it. Might change..