Igarasi Tiba

Igarasi Tiba (五十嵐千葉, Tiba Igarasi) is an S-rank nin missing-nin from Konohagakure and a former member of the Uchiha and Tiba clans. She along with Sasuke survived the Uchiha Massacre as she was just a baby, and was not considered an Uchiha due to her mother being from another clan.

Background
Igarasi mother was from the Tiba a smaller clan and her father an Uchiha. Her parents were scorned and mistreated by both clans as the two never got along due to disputes. Her parents were ultimately killed during the Uchiha massacre. She grew up an orphan and on the streets, during this time she befriended Naruto Uzumaki, however, she disliked the blonde hair boy and preferred to be alone.

Igarasi trained herself every day and taught herself everything about the Sharingan which she awakened after saving her only friend. Her friend died and she was able to awaken the Mangekyō Sharingan. Igarasi left the village, before the events of Part II and didn't return until the New Era. She has trained herself and sought revenge on the Uchiha clan for her families mistreatment.

Personality
Igarasi as a child was rough natured and refused anyone's assistance or aid. She was cold and selfish only caring about herself. She had deep-rooted resentments against the Uchiha Clan and the Hidden Leaf she sought revenge against Itachi Uchiha but when he was killed by Sasuke Igarasi sought to kill Sasuke and wipe out the legacy of the Uchiha.

In the New Ear, Igarasi shows anger and hatred for the Uchiha clan. She is prone to mocking Sarada and Sakura for wearing the Uchiha Crest. She also, strangely enough, is able to remain calm in the midst of battle and is unfazed by threats, mocks, or insults. Igarasi was also stoic and disciplined often not showing any kind of emotion not even smiling. When she activated her  Mangekyō Sharingan her personality changes it becomes erratic, making her sound crazy or even insane her fighting style also changes to that of more of a berserker she at this point has no care for injuries and keeps fighting with one goal in mind, to kill all her opponents at no cost even if it kills her.