Naruto Shippuden 3: Inheritors of the Will of Fire Concepts

In the Naruto universe chakra is a form of energy through which ninjutsu moves can be accomplished. There are five different types of elemental chakras.

A Female Ninja in Japanese is referred to as a kunoichi. They were given special training that took advantage of a woman's natural gifts.

Seen in just about every form of anime at least at one point. The key component that makes Shounen popular among boys. As well as Ancient art in itself

A ninja is a (typically Japanese) warrior, trained in martial arts fighting styles, and whom typically specializes in stealthy tactics and unorthodox arts of war.

A list of people who won't reveal their past even though it might be revealed later. Who knows, it could either be an extrordinary timeframe, an emberassing childhood or an shockingly dark chain of events.