Can't talk now, thinking about Sasuke...
Haruno Sakura is one of the main characters in Naruto, and a minor character in this fic.
Here's a quick rundown of Sakura:
(Warning, possible spoilers up to the Chuunin Exam)
She is apparently very very smart, though you wouldn't know it at this point in the series. Right now she just basically runs around going "Sasuke-kuuuuun! (But don't worry, while going throught he Chuunin exam she's slowly developping a personality.)
While she seems fairly normal on the outside, she has an Inner-Sakura that says what she's really thinking. Inner-Sakura kicks ass!
Her and Yamanaka Ino used to be friends, but became rivals when they discovered that they both likes Sasuke.