Ichiko Uchiha

Their was once a Clan named the Uchiha Clan but an unfortunate event causes the Clan to nearly go extinct, only 3 people remain of this Clan. Itachi Uchiha, Sasuke Uchiha and a long lost sister who goes by the name of Ichiko Uchiha. Same age as Sasuke as they are twins, what happens when she come back before graduation but doesn't say her last name. And has the highest grades, unlocked all of the Sharingan including the Mangekyou Sharingan. She's emotionless and has many fan boys. After all she is Sasuke's twin so of course their going to have the same personality but she has no emotions showing on her face, she does have the famous Uchiha smirk. Sasuke never knew about his twin as she was sent away at a early age to train as a ninja, to exceed her older brother. Then that all changed the one whom she looked up too, destroyed her life by murdering the whole of the Uchiha Clan except for his two younger siblings, he couldn't kill them both. She now hates him and wants revenge but that revenge is different to Sasuke's.