User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-207.242.44.6-20181227201144/@comment-33341107-20181227205315

Like I said she has time to develop it, and presumably the symptoms of her sickness will pass over time, after her im pretty sure it was said in a previous volume that only kings (or people who have yet to compete) can join, so after Ingvild it will probably be Rias.