User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-2601:87:8300:20D0:7470:DBA5:D975:929B-20181102114352/@comment-2601:87:8300:20D0:5015:49C8:D7D4:F42-20181115040000

I think the Knight should be next. I can't speak for everyone, but I can't think of anyone to fill in the position. Whether we're right or wrong I can think of couple of people who can be Rook or Pawn, but not the Knight. That's why I think at the very least the Knight will be a new character for Issei's peerage.