User blog comment:B214/Volume 21 info & spoilers/@comment-74.173.162.168-20160420191216/@comment-26926813-20160423133310

If its possible I think she when Issei get his evil pieces he will make her his queen

It's absolutle impossible. Lilith is a Dragon God, and we all know that Gods are immune to Evil Pieces sistem. Azazel told about it i remeber that