Buttercup
Wikipedia
The Hunger Games Character Guide
Buttercup is Prim's cat. Though Katniss describes him as "the world's ugliest cat", Prim disregards this and takes good care of him. He is Prim's companion and is loyal only to her.
Although he did not escape with Prim and Mrs. Everdeen, Katniss found him when she visited District 12 after the bombings and brought him back. He is said to dislike District 13, due to its underground location and lack of fresh air.
After Prim's death and the end of the war, he makes his way back to District 12 on foot and is found again by Katniss. The two mourn Prim's death in Mockingjay and end up comforting each other (it is hinted they are beginning to love each other). Buttercup has black and white fur in the first film (contrary to his name), but in later films better fits the books' description of him.
Although he did not escape with Prim and Mrs. Everdeen, Katniss found him when she visited District 12 after the bombings and brought him back. He is said to dislike District 13, due to its underground location and lack of fresh air.
After Prim's death and the end of the war, he makes his way back to District 12 on foot and is found again by Katniss. The two mourn Prim's death in Mockingjay and end up comforting each other (it is hinted they are beginning to love each other). Buttercup has black and white fur in the first film (contrary to his name), but in later films better fits the books' description of him.