Could it be Niylah, shown below, as played by Jessica Harmon?
The official plot description forThe 100season 3 teases a short-lived peace for these characters.
First, they fought to survive.

Credit: Cate Cameron/The CW
Then, they fought for their friends.
Now, they will fight for the human race.
The 100premieres its new season with Wanheda: Part One on Thursday, Jan. 21, at 9 p.m.

Cate Cameron/The CW

Cate Cameron/The CW

Cate Cameron/The CW

Cate Cameron/The CW

Cate Cameron/The CW