When Sakura first attempted to confess to Sasuke, he rejected her because he didn't know her and she fled out of frustration and embarrassment.

She vented her displeasure for his rejection by punching a tree and causing her Inner Sakura to be born.

She now holds his abilities in high regard, is ever-worrying for his safety and well-being to the point of feeling unbearable guilt, and values him as one of her closest friends.

At other times, Sakura and Inner Sakura are indistinguishable from each other, usually with regards to Naruto Uzumaki; if Naruto says or does something that annoys or upsets her, Sakura responds with violence, a reaction that under other circumstances would be delegated to Inner Sakura.

As Part I progresses, Sakura is increasingly exposed to the realities of the world, difficulties for which she cannot rely upon Inner Sakura to cope with.

As an Academy student, Sakura succeeded through studying alone to the point of pride, able to avoid physical trials and thus allowing her to focus on her physical appearance in a bid to appeal to Sasuke.

As a shinobi, however, this is insufficient: the long hair she puts so much effort into is a liability that opponents can use against her; missions cannot be completed with mere book smarts and it is necessary to be able to fight so that other shinobi will not kill her or her teammates.

Sakura had a normal childhood, raised by her parents without any serious tragedy or complication.

When she entered Konoha's Ninja Academy, some of the girls in her class started picking on her because of her large forehead.Sakura tried to combat their teasing by hiding her forehead with her bangs, but this proved to the other girls that it bothered her and caused them to tease her even more.Ino Yamanaka, one of her classmates, saw this, defended Sakura from her bullies, and encouraged her to embrace her forehead rather than hide it.At some point after she entered in the Academy, Sakura met Sasuke Uchiha and she developed a crush on him.When she told her friends, she was surprised to learn how popular Sasuke was with the girls.Sakura heard a rumour of Sasuke being attracted to girls with long hair and she began letting her hair grow to get his attention.