Final answer:
Cinna gives Katniss a 'Girl on Fire' costume, which differs from past District 12 costumes and symbolizes rebellion against the Capitol.
Step-by-step explanation:
In the Hunger Games series, Cinna, who is Katniss Everdeen's stylist, gives her a costume known as the 'Girl on Fire' costume. It differs from the past District 12 costumes in that it represents a significant statement and symbolizes rebellion against the Capitol. The 'Girl on Fire' costume is a black outfit that transforms into a dress covered in synthetic flames, symbolizing Katniss' defiance and becoming a symbol of hope for the people of Panem.