Heh. The sensei character is as traditional as it can be. In how many animes exactly have we seen female teachers having a crisis of singleness? Too many to count.

It seems like Konata's old man is getting screen time steadily. That's jolly good. You just never know what that weido is going to do next. Even Konata herself looks pretty normal in comparison... Though it's amusing how she treats him as if there was nothing out of ordinary, so that alone raises her oddity factor, naturally.