Inner Sakura.

Within Sakura resides "Inner Sakura" (内なるサクラ, Uchi Naru Sakura), a manifestation of her inner emotions. In addition to comic relief, Inner Sakura represents Sakura's actual opinion on things when she outwardly displays something opposite. For example, when Naruto played a prank on Kakashi, Sakura outwardly deemed it "childish", but in the inside she enjoyed it. Inner Sakura's appearances are typically marked by an exclamation of "Shānnarō!" (しゃーんなろー). The phrase has no literal meaning, but is usually translated as "Hell yeah!", "Hell no!", or "Damn it!", depending on the situation. The English anime, for censorship reasons, replaced the aforementioned phrases with a forceful "Cha!". Inner Sakura is unique as it is in a way a second will within Sakura's mind. When Ino used the Mind Body Switch Technique on her, Inner Sakura was able to repel the user from her body, suggesting that Sakura has a split personality, consisting of the "Inner Sakura" and her normal personality.

Although she appears quite frequently at the start of the series, Inner Sakura all but disappears midway through Part I, her only other subsequent appearance being at the start of Part II. Sakura, likewise, now performs the emotional, violent outbursts she once relied on Inner Sakura for, much to the dismay of those who are around her at the time (typically Naruto).