User blog comment:B214/High School DxD EX/@comment-27083298-20170415041321/@comment-30924344-20170417032056

@Pawn Well three had to left behind either way to take over as the 3 vacant Head Angel positions. Unless Gabriel is waiting until Heaven is properly back to normal before implementing a "Seven Great Seraphs" system like Ajuka will do with a "Seven Great Satans" system after the tournament at some point.