The District 10 female was the female tribute from District 10 who participated in the 75th Hunger Games. She was also the victor of an unspecified Hunger Games and presumably trained other tributes as a mentor.
75th Hunger Games
In the book, during the chariot rides, she was dressed in a ridiculous looking cow outfit, with flaming belts, which unintentionally appeared as if the cows were broiling themselves. Unlike the film adaptation, she is seen behind Finnick, when he is talking to Katniss. She is wearing a Greek gown, the top part is dark blue, as the bottom fades into a lighter blue.
It is unknown if she showed up for training as well as her district partner. However, she is seen waiting her turn to show the Gamemakers her skills, while talking with the other victors.
She wore a black leather suit and watched each tribute's interviews with Caesar, until hers. She joined hands with the other victors as a sign of rebellion against the Capitol, which angered them greatly.
The District 10 female was killed in the initial Cornucopia bloodbath on the first day of the Games. Her pedestal was stationed next to Gloss. She was presumably killed by one of the Careers.