Gale is a very important character in the Hunger Games, as he takes care of Katniss Everdeen and her family before and during the games. He also helps her during the Quarter Quell, and even leads a number of other tributes to safety. However, Gale does not appear in the final film, Mockingjay, and it is presumed that he was either killed or tortured by the Capitol.
Thresh is the male tribute from District 11 and a Career tribute, meaning that he had specialized skills in certain areas of the game. He is one of the physically strongest and largest tributes and was a top contender in the games. During the bloodbath, he helped to rescue Katniss and Peeta. He then brutally killed Clove when he found out that she had attacked Katniss.
Mags is the District 4 female tribute and was the oldest of all the tributes in the games. She was frail and spoke in broken fragments that Katniss could only understand through her body language. She volunteered for the Games to spare Annie Cresta, who was the girlfriend of Finnick Odair. During the games she was slain by Brutus and finished the game 15th overall.
Casca Highbottom is the mentor for the female tribute from District 12, Lucy Gray Baird. He is an expert in the use of knives and was a Career tribute. He was tainted by his relationship with Crassus Snow and became a morphling addict, which led Coriolanus Snow to mock him as “High-as-a-kite-Bottom”. He is later stabbed in the chest by Johanna Mason and killed during the bloodbath.