Katniss has matured a lot for her age due to being the sole provider to her family
"It was slow-going at first, but I was determined to feed us. I stole eggs from nests, caught fish in nets.."
she gives up her chance of staying home and alive so her sister dose not have to leave
" With one sweep of my arm, I push her behind me."I volunteer!" I gasp. "I volunteer as tribute!""
she knows what the capital dose and has not let the sudden fame get to her
"Effie Trinket lets out a squeal, and everybody is slapping me on the back and cheering and congratulating me. But it doesn’t seem real."
"I can't win. Prim must know that in her heart. The competition will be far beyond my abilities. Kids from wealthier districts, where winning is a huge honor, who've been trained their whole lives for this. "
she knows that she will not make it back and wants her family to be taken care of
"about the people who rule our country, Panem, from the far-off city called the Capitol. Eventually I understood this would only lead us to more trouble. So I learned to hold my tongue.."
she knows what the capitol is doing and makes a stand against them
"I'm ashamed I never tried to help her in the woods. That I let the Capitol kill the boy and mutilate her without lifting a finger. Just like I was watching the Games."
she is starting to realize that they are just pawns in the game hosted by the capital to entertain.