Haymitch Abernathy from The Hunger Games.
One of the two sole District 12 citizens to have won the Hunger Games, and the only one surviving. As such, he serves as a mentor to his district's tributes. He is a heavy drinker, which makes him seem a buffoon to most, but once Katniss and Peeta impress him, he proves himself a rather adept mentor through establishing their unified front strategy. Though Katniss professes to despise him, she realizes through the novel that they are very much alike in their craftiness and ability to suppress their emotions.
http://www.gradesaver.com/the-hunger-games/study-guide/character-list
Haymitch Abernathy was the only living Hunger Games victor fromDistrict 12, having survived the second Quarter Quell, before Katniss Everdeen and Peeta Mellark won the 74th Hunger Games under hismentorship. He worked secretly in tandem with District 13 and other victors in order to incite the second rebellion, and was the main drive behind the rebel plot during the 75th Hunger Games.
