Madi Griffin

Madi is a minor character in Season Four. She is a young Nightblood that met Clarke Griffin sometime after Praimfaya. She is portrayed by Imogen Tear and debuted in Praimfaya.

Early Life
Madi was born a Nightblood to unknown parents who most likely kept her special status a secret as she wasn't sent to Polis once she was old enough to train as the next Commander. She was presumably orphaned as the second Praimfaya plagued the Earth. Sometime later at one point she met Clarke and become her figurative daughter.

Throughout the Series
In Praimfaya, Madi is asleep in the Rover and is later woken up by Clarke. Upon being woken up, she expects to finally meet Clarke's friends from The Ark but is confused when she sees the Eligius Corporation ship fly in instead. Clarke tells her that it's not her friends and tells her to get the rover out of sight and to load the guns.

Physical Appearance
Madi has pale skin, braided light brown hair and green eyes. She is seen wearing a black beanie and grounder clothing.

Clarke Griffin
Madi and Clarke have a figurative mother-daughter relationship.

Notes and Trivia

 * Madi met Clarke one year after the second Praimfaya.
 * In the show, it was hinted by Jason Rothenberg that Madi was Clarke's reason to live after Praimfaya.
 * Madi has been living with Clarke for five years in 2156.
 * Madi is Clarke's foster daughter.
 * It is unknown which clan she came from or what happened to her family.
 * Imogen Tear announced on her Twitter that she would appear in the season finale as Madi a few days before the episode aired.
 * Madi's name is misspelled in the credits of Praimfaya as Maddie.