Mathira Melarn was a member of the Ched Nasadan House Melarn. There was a broken bust of Mathira in House Melarn's great hall. At some point, she joined the worshipers of Eilistraee and became a sword dancer. She wielded the Crescent Blade, a sword said to be created by Eilistraee for the purpose of destroying Lolth.
Mathira was last seen in Harrowdale, making her way to Black Feather Bridge. She was burned to death on the Cold Field by acid from a black dragon. She then became a ghost, who appeared to her descendant, Halisstra Melarn, in 1373 DR as she sought the Crescent Blade.