I'll gladly be the first to reveal the identity of this Naruto character. Her name is Tsunade, one of three famous Sannin (the other two are Orochimaru & Jiraya) of Konoha. She is a well-known medical or healing ninja who later in the anime series becomes the Fifth Hokage (Goddaime) after the death of the Third (Sandaime). A monor note: she had a bad gambling habit, at least until she became Hokage.