CHARACTERS HISTORY (taken from Wikipedia):

Effie Trinket:
A capitol-born chaperone who got stuck with District 12 in the Hunger Games, particularly to Katniss and Peeta, carrying out such tasks as drawing the tributes' names at the reaping and escorting them to the Capitol. At first, she detests her association with District 12, trying to be promoted to a better, richer district. Effie later becomes attached to her District 12 acquaintances. Effie has bright pink hair that appears to be a wig. She seems totally oblivious to the misfortunes of District 12, although whether this behavior is intentional is unknown. She is very strict about manners and is always punctual. In Mockingjay, it is said that she was imprisoned after her escape, but meets up again with Katniss before Snow's execution.

Lavinia:
A servant girl whose tongue has been cut out for being a traitor. She has red hair, porcelain skin, and striking features. Because of her inability to speak, Katniss does not know her name or anything about her. Katniss recognizes her from when she and Gale witnessed the girl's capture and the death of her friend, and Katniss later speculates that she is a runaway from the Capitol. In Mockingjay, Katniss learns that her name was Lavinia and that it was planned that she be tortured to death. Katniss learns from Peeta that her torturers used too much electricity during the process and her heart stopped.