Lin Beifong

 Chief Lin Beifong is the Chief of Police in Republic City and the daughter of Toph Beifong. She views the new Avatar as the biggest threat the city has faced in recent times, as Korra's reckless ways are constantly leaving Lin Beifong's streets in ruin. Having no special affection for the new Avatar, even though her mother taught the Avatar's previous incarnation how to earthbend, Lin is determined to push Korra out of the city.

History
Born to Toph Beifong sometime after the War, Lin inherited the earthbending prowess of her mother, eventually mastering the art and its subskill, metalbending. As an adult, she became the Chief of Police of Republic City, where she stands at the head of a group of metalbender cops.

Personality
Lin is tough and uncompromising, and believes that the only way to maintain peace and stability in Republic City is through the use of military might. She works hard to enforce the city's laws.

Relatives

 * Toph Beifong (mother)
 * Lao Beifong (maternal grandfather)
 * Poppy Beifong (maternal grandmother)

Trivia

 * She was first announced on July 23, 2011 at San Diego Comic Con, and is the second named child of a member of Team Avatar, the first being Tenzin.
 * Lin Beifong is one of the few named female earthbenders in the series, the others being her mother, Kori, Penga, Oma, Morishita's wife, and all the female Avatars.
 * Chief Beifong's appearance bears a greater resemblance to her grandmother Poppy Beifong than to her mother, at least as seen in the Avatar: The Last Airbender series.
 * Lin Beifong has two scars on the right side of her face; the origins of which are still unknown.