Samantha Darko is the main protagonist in S. Darko and the sister of Donnie Darko. She is played by Daveigh Chase.
In Donnie Darko, she is only 10 years old and is constantly mistreated by Donnie. She is part of a dance group called Sparkle Motion.
S. Darko takes place 7 years after Donnie Darko. Samantha, now 17 drives with her friend Corey to become professional dancers. they end up at a small town in Utah.