Tenten is on the same team as Neji and Lee, with Gai as the team leader. She only plays a minor part in the Naruto series. All we really know of her is that she's a young specialist in throwing ninja-weapons. And she works hard to become a really strong ninja like Tsunade, one of the three Sannin which she refers to as the legendary female ninja, her idol.
She also seems to have some sort of feelings towards Neji. She admires him, helps him train, and deeply praises his skills.