Ino Yamanaka (山中いの, Yamanaka Ino) is one of the main supporting characters of the series. She is a chūnin-level kunoichi of Konohagakure's Yamanaka clan and a member of Team Asuma. Along with her team-mates, Ino makes up the new generation of Ino–Shika–Chō, just like their fathers were before them.
In the Academy, Ino was considerably more popular and self-confident than Sakura Haruno when they met. She convinced Sakura that hiding the size of her forehead was pointless, saying that it only made her look worse. Ino gave Sakura a red ribbon to draw attention elsewhere, suggesting that Sakura had great potential, but had yet to reach it. This lead to ongoing arguments about Sakura's "Billboard Brow" and Ino's nickname "Ino-pig" (due to her name, Ino, meaning 'boar'). Despite all these arguments, she helped Sakura gain her confidence. When Sakura became attracted to Sasuke, and found out that Ino was attracted to him as well, Sakura ended their friendship hurting Ino in the process so she could compete with Ino for his affection. Ino later made friends with Sakura again during the Chūnin Exams, but they are still considered rivals by many.