Sasuke Uchiha is your older brother, you are his younger sister. You guys have been split up since the Uchiha massacre, about 10 years ago, Sasuke is now around the age of 25-27, and you are 18.

You work for Orochimaru, your very pretty you wear a dark (color) Fabricated mask to cover your beauty, and you wear an eyepatch to cover your signature Sharigan so that no one knows your an Uchiha, only Orochimaru knows your identity.

You guys were in the leaf village, and you saw team 7 but no Sasuke, since he had already gone for revenge against Itachi, but Kakashi recognized your hair and even your facial features that were hidden behind your mask, he knew you were a Uchiha, and possibly Sasuke's long lost sister. Meanwhile Sasuke was hidden in the village but watching intently an quietly, no one knew where he was... but they could feel his presence. Naruto and Sakura paid no heed to you but Kakashi couldn't take his eyes off of you, Orochimaru smirked with his snakey look.

Orochimaru: Seems you have someone who might recognize you.... (Y/N)

Meanwhile Sasuke was perched up on a tree watching Kakashi with a knowing smirk, he stood quiet watching everyone intently without them knowing