I am betting these are Sasha and LC Pandora.

Original SS Pandora doesn't wear that dress.

neither Athena lol, but i think you´re correct, we can see that "anti-death plant charm" on Sasha/Athena´s ankle.

But her hair confuses me... looks like Saori´s me thinks xD

Both Saori and Sasha have the same hairstyle, dood.

Even though now I am regretting what I said. Saori's eyes are blue, Sasha's are green, lol.

same hairstyles yes, but with the different drawing styles, looks diferent xD

the only thing that creates the anachronism is the rose bracelet in her ankle.