Danitra Jenkins (portrayed by Samaria Graham) is Jamal's sister. She is six years older than him. She nicknames her brother "Jammy-Jam".
Jamal has a somewhat difficult relationship with her.
At the beginning of the series, Danitra went off to college and she gave Jamal her computer.
She made a later appearance in the first season during the story arc "Who's Who" where Grandma Jenkins was sick.