Who is portia in The Hunger Games?

I would imagine that Portia acts to Peeta as Cinna does to Katniss. She is probably someone who seems to understand everything you tell her and she is seen to get very emotional. She supports Katniss just is Cinna does and seems to go hand in hand with him and be a great help during the games. She also has and eye for style and knows what works best for an individual. She is her own person, and just as Cinna is, she isn' t emotionally ruled by those in charge of her.