Suzumiya Haruhi no Yuuutsu (The Melancholy of Haruhi Suzumiya)
Suzumiya Haruhi, is an intelligent high school girl with a mischievous personality, and very egocentric disposition, and upon enrolment at school she announces:
"I have no interest in ordinary humans. If there are any aliens, beings from the future, or super-humans, come see me. That is all!"
Naturally, this did raise a few eyebrows, but Haruhi is dead serious. Things get awkward when everyone realises just how serious she is about it all and establishes the SOS Brigade. What makes her quite ominous though is her unimaginable power to actually change the world, but she is totally unaware of her own power and so she is also unaware of the affect of her power on the outside world. The cynical Kyon, a friend at the SOS Brigade, is among the few who knows of Haruhi's power, and is desperately trying to keep the world together.