Inner Sakura

is a manifestation of Sakura Haruno's inner emotions. Inner Sakura represents Sakura's actual opinion on things when she outwardly displays something completely different. 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 translates it as a forceful "Cha!" Inner Sakura is unique, as it is, in a way, a second will within Sakura's mind. When Ino used Mind Body Switch Technique on her, Inner Sakura was able to repel the user from her body.

Although she appeared quite frequently at the start of the series, Inner Sakura all but disappeared midway through Part I, and rarely appears in Part II. The reason behind this is that she no longer needs to hide her true feelings or reactions behind a fake smile, finally allowing herself to truly say what is on her mind. However, because Inner Sakura usually possessed somewhat violent reactions to things, Sakura is now prone to violent outbursts, which is not helped by her chakra-enhanced strength, making her very scary should one upset her, similar to her teacher, Tsunade.

Trivia

 * In the Ultimate Ninja, Naruto: Path of the Ninja, and Clash of Ninja videogames, Inner Sakura is used as a jutsu, due to Sakura's lack of jutsu of her own.
 * The symbol that is written on Inner Sakura's forehead literally means "Inner Sakura".
 * In the Clash of Ninja videogames, Kakashi can copy Sakura's "Inner Sakura" jutsu using the Sharingan allowing him to unleash his "Inner Kakashi" (basically his version of Sakura's technique).
 * An anime filler arc has shown Ino having her own version called Inner Ino.