Board Thread:Questions and Answers/@comment-26296626-20150410010526/@comment-26266734-20150719133208

The dialogue implies that there are many Knights of Ishtaria, and that not all of them are Summoners, but the player-character is considered THE Knight of Ishtaria. It is unfortunate that his gender is always male, but I guess the developers wanted the focus to be on the heroes, not on the summoner.