I love Avante Garde. It can be dark, twisted and delusional. But isn't that what Dark Souls consider beautiful? We find beauty in the unusual, we see past the morbid and celebrate the life in the shadows.
I would cut out the chest area and add lace matching the sleeves. You could connect the top of the lace with the dress material so that it looks like a choker. If you made the lace in an upside down heart; that would look very pretty and subtly sexy.