User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-2601:87:8300:20D0:7CA8:4571:A3B3:1C41-20181130062404/@comment-2601:8C:601:5692:385C:86EA:9AE7:1853-20181203081738

More likely, Grayfia would be in charge of such training.