Costia

Costia was a Grounder from The Woods Clan and Lexa's girlfriend until Costia's death at the hands of the Ice Nation's queen.

Costia was first mentioned in Remember Me when Lexa tells Clarke about how she was captured, tortured, and beheaded because the Ice Nation's queen thought she had information on Lexa. Little else is known about her past. Her status as Lexa's deceased lover makes her one of the first LGBT characters in The 100 canon.

Early Life
Little to nothing is known about Costia's early life except that she met, befriended, and eventually fell in love with Lexa.

Throughout the Series
In Remember Me, Lexa tells Clarke about Costia after the funeral for the massacred victims of Tondc and Finn Collins. Lexa mentions that she loved someone by the name of Costia and the Ice Nation Queen kidnapped her, tortured her, and cut off her head because they thought that she knew Lexa's secrets and because she was hers.

In Bodyguard of Lies, Clarke mentions Costia when she is telling Lexa she is weak for hiding her feelings and that she is still haunted by Costia's death.

Notes and Trivia

 * She was named after Anacostia in Washington DC.
 * One of three known LGBT characters, the others being Clarke and Lexa.