How we cite our quotes:
Enemy. Enemy. The word is tugging at a recent memory. Pulling it into the present. The look on Haymitch's face. "Katniss, when you're in the arena . . ." The scowl, the misgiving. "What?" I hear my own voice tighten as I bristle at some unspoken accusation. "You just remember who the enemy is," Haymitch says. "That's all." (26.50)
Katniss has been fighting the other tributes this whole time, but she has nothing against them personally. She's been used like a puppet to fight the battles of others. Here she finally realizes what the advice Haymitch gave her so long ago really meant: she and the other tributes share a common enemy, the Capitol, and can do something about it.