Many would look at this character as a villain,
especially not at first,
but my candidate for Day 9 is
I didn't understand before the second time I watched
Mahou Shoujo Madoka Magica.
But at least I see him as the villain
of tricking the main characters into making a deal with him.
I won't say much more, because I want you to watch the anime yourself.
And if you do, please comment what you think ;)