No, Katniss is the official Mockingjay, Rue inspired the revolution, but Prim started it. If Prim hadn't gotten picked Katniss wouldn't have volunteered then she wouldnt have met Rue who sparked the Mockingjay.
Tribute to a Tribute: The Evolution of Katniss Everdeen [Infographic]
Hunger Games, behind the scenes- I love this film that little bit more than you because I know what a great bond all of the actors ( kids) had - famous and well known actors have told the cats of THG to treasure the experience
I did know Rue. She wasn't just my ally, she was my friend. I see her in the flowers that grow in the meadow by my house. I hear her in the Mockingjay's song. I see her in my sister, Prim. She was too young, too gentle. And I couldn't save her. I'm sorry.