Rōko Uchiha

Rōko Uchiha (うちは牢固, Uchiha Rōko) was a kunoichi who lived during the Warring States Period, prior to Konohagakure being founded. She is a member of the Uchiha Clan. She's an original character created by Love-Inspired of DeviantART.(Now on the account SweetContext.)

Background
Rōko was born into the warring states period; years before the founding of Konoha. As was custom during the time, she grew up as a child of war; constantly battling the Senju Clan.

On the odd occasion of temporary peace, Rōko spent much of her time training and sparring. Thanks to her parents upbringing of her, war was drilled into her mind and body, and became natural. Another innate talent she had were for her sais. For her purposes though, the blades were sharpened, instead of being left dull.

She was choosey with whom she formed bonds with, as with the time, you could lose anyone at any given time. Thus she chose to befriend those who she deemed 'strong'. Quickly she became friends with Tatsuki Uchiha, and Izuna Uchiha. She however, on most occasions avoided Madara, claiming "Somewhere, he's a power hungry, deranged beast.". She does admit though, that he selflessly loves their clan, and brother most of all.

As the years went on, her hatred toward the Senju Clan grew more and more with each Uchiha member they had cut down in battle. As her anger grew, so did her reputation in battle; war prowess becoming similar to muscle memory.

Rōko became uneasy as the years dragged on, especially so with Madara being put into power as clan head. Respectfully, she listened to her new clan leader, and shared a place next to Izuna. This however did not last long, as Izuna died in battle; this was the stepping stone for her Mangekyō Sharingan. For Rōko, this paired along with Tatsuki surrendering to their enemy, was the final breaking point, and she vowed to never forgive the Senju.

Founding of Konoha
Rōko was of the very few Uchiha who still craved war. Even fewer who wished they had never formed a treaty with the Senju. Begrudgingly, she followed the movement of the clan and held her tongue.

The young Uchiha held contempt towards the village and grew bitter by the year. She poured all of her concentration into mastering her ocular jutsu and other ninjutsu, as well as honing her abilities with her sai.

Even if their was tension, to her the village would be much better suited with Izuna beside her. This thought tormented her for years, up until her death.