In The Hunger Games by Suzanne Collins, Katniss is deeply affected by the avox girl with the red hair. Katniss recognizes her at once as being familiar, but cannot connect her face to the correct memory. When Haymitch mentions the fact that most avoxes are "traitors," Katniss suddenly remembers that scene in the woods with the striking red-headed girl seemingly running away from the Capitol (78).
The avox girl "with her maimed tongue frightens" Katniss, by reminding her why she is here--"not to model flashy costumes and eat delicacies. But to die a bloody death while the crowds urge on [her] killer" (80). The red-headed avox girl serves as a startling visual warning of the Capital's cruelty; her presence in District 12's suites startles and dismays Katniss, but also helps her focus on the reality of what she must do to survive. The surreal environment may have temporarily distracted Katniss from the true meaning of the Games; she did get caught up in the training, interviews, and wardrobe changes.
She says she knows the Avox and knowing or associating with an Avox is a terrible crime. When she says that the people at the table freeze but Peeta saves her by saying that she resembles someone within District 12 which confused Katniss and everyone becomes much more relieved. But Katniss can relate to the Avox because the Avox is what symbolizes Katniss, a rebel where rebels are needed in the world.
Katniss is pretty affected by the avox girl in my opinion, even though it may not directly say so or seem like it in the book (s). Since avox's are rebels, Katniss first sees them as a threat to the system, when she doesn't personally want to rebel against the Capital or anyone else. Later, when she realizes that the Capital is bad and needs to be destroyed, the avoxs indirectly symbolize what Katniss is, a rebel in a world that needs rebels.