Probably one of the most strangest characters I've ever seen, Haruhi Suzumiya is basically a mix of God and Selphie...with amnesia. Why? Because she can change reality to the point that she can destroy the world, and then remake it into a new one...but she doesn't even know that she has the power.
The central character behind the ongoing series of light novels "The ... of Haruhi Suzumiya", she's an energetic, enthusiastic, occult high school student. The leader of the SOS Brigade, which is some club devoted to alien/supernatural sightings and other oddities. In the club with her is Kyon, the "non-believer"/love interest who was forced into the club, Yuki, a quiet bookworm type with a monotonous voice who happens to be an "artificial human"/alien, Mikuru, a time-traveller with a cutesy-squeaky voice, and my least favourite, and last, Itsuki, the foreign exchange student who happens to be an ESPer (psychic person). As the story unfolds, the three other members reveal to Kyon their primary objective of being in the Brigade: to keep watch over and entertain Haruhi as much as possible so she doesn't get bored and change reality, and in turn destroy the whole world. Harsh.
As far as I know, Haruhi continues to be a mystery to me, which only adds to my increasing want to know more about her and everything about her world. If only I could actually get a hold of a light novel or an anime DVD, but the anime itself isn't a reliable source...D'oh.
I love her hairstyle. It really fits with her outfit. =)