Itachi Uchiha is Sasuke's older brother, a member of the Anbu and a prodigy of the Uchiha clan. He is described as 'lunatic with a mind only for his younger sibling' and 'deranged, brother-obsessed.' He is psychologically twisted, capable of killing his own clan members, including parents, elderly, women, children, and the disabled. He suspects spies and could kill Sakura for being too close to Sasuke. He laughed and flicked Sasuke's forehead after hearing about Sakura's provocation, indicating a complex relationship with his brother.
