Thread:Astarothfan/@comment-32724211-20170919143126/@comment-24421137-20170919222838

1. Its just a curse that Loki put to take out the Gremory team. It manifested itself from what i guess, juggernaut drives emotions of pain and was able to because of Loki's power. That's from what i understood.

2. I don't know. People are free to speculate about that as much as they want as far as I care, I don't believe it is either confirmed or denied (Maybe if rias said that Issei was the first ever man she did that with). Besides Rias did that in order to share her demonic energy with Issei so he could heal quickly. Its not necessary and the are other various methods of healing someone.

Also if you have anymore questions direct them to a blog so everyone in the community has a chance to respond and you don't have to depend on one person's answer.