You might want to think about the way that Peeta is presented in the following two areas of the novel. Firstly, in Chapter Two, when Peeta is selected, Katniss gives us a flashback that shows real insight into his character, and above all his compassion and humanity. Note what Katniss remembers of this incident:
I stared at the loaves in disbelief. They were fine, perfect really, except for the burned areas. Did he mean for me to hae them? He must have. Because there they were at my feet.
The way that Peeta deliberately burns two loaves and then is hit by his mother as a result so that he can give the bread to Katniss, who is starving, really shows the kind of person he is more than his words could ever demonstrate. In addition, it also reflects his devotion to Katniss, which of course becomes very important in the rest of the novel.
Secondly, and more interestingly, you might want to think about the way in which Peeta conducts his appearance in the Hunger Games, and the kind of ingenuity he demonstrates in the way that he allies himself with the group of strong tributes so that he can protect Katniss but also ensure his own survival t begin with. The way that later on he shows he is an expert in camouflage also demonstrates his considerable talents and resources. Although Peeta is essentially a good boy, he is certainly not naive or without skills and talents.