Ino Shikamaru.
Ino Yamanaka is considerably more popular and self-confident girl than Sakura when they met at the Ninja Academy. She convinced Sakura that hiding the size of her forehead was pointless, and gave her...
Ino is a kunoichi of the Leaf Village, and she used to be best friends with Sakura.
That has not been revealed yet.
we don't know yet