Loyalty is an important theme in the novel The Hunger Games written by Suzanne Collins. The theme is present in the entire series as well.
Throughout the series, Katniss Everdeen exudes loyalty. She is loyal first and foremost to her family. Katniss takes care of her mother and sister by acting as a parent-figure. She cleans the house, hunts for food, and trades for goods. A major point in the story where loyalty is shown is when Katniss wishes to protect her sister, Prim, and therefore volunteers herself as tribute to participate in the games.
Once Katniss arrives at the games, she must remain loyal in her alliances with other competitors in the games in order to survive. Katniss is especially loyal to Rue, a young tribute, and to Peeta, the male tribute from her district. Katniss shows compassion for Rue after Rue's death by singing to her and covering her with flowers. Katniss proves her loyalty to Peeta when they are the last two remaining tributes and must decide who will live and win the games and who will die. Katniss creates a plan where both her and Peeta can survive or they can both die and ruin the games entirely. This moment is a pivotal point in the series because it sparks the rebellion against the Capitol that is led by Katniss.
Katniss is loyal enough that she is willing to sacrifice herself for those in her life who are important to her.