Sophitia and Cassandra

Comment: In my mother's library I found the book about about Pergamon Altar. I was stunned by these amazing reliefs, flowing folds, perfect anatomy! Surely, these Ancient guys were real masters... I drew this pic, because I wanted to copy some of hitons from Pergamon Altar
Game: Soul Calibur 2-3.
Materials: pencils+black ball-pen
Maybe slight yuri/incest hints ^__^