User blog comment:B214/Volume 23 discussion blog/@comment-190.160.185.214-20170411002917/@comment-10330822-20170412011243

It would certainly help Vali's case to being the natural rival of Issei, because, even though they are fairly even at the moment, one would suspect Vali can't compete with Issei's body made from Great Red's flesh.

So, the idea that maybe Vali and Lilith share some connection through Trihexa is interesting.