How to draw Wall Maria, Wall Rose and Wall Sina from Attack on Titan

Wall Maria, Wall Rose and Wall Sina from the anime Attack on Titan. Do these symbols represent something? i think these women on the symbol might probably have something to do with the walls and the titans. Who knows Music credits: Movement proposition by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/