Who Is The Creature?

That Old guy from the Trelocorn Village was the one who gave the quest to the Magic Knight Headquarters. For What the Papers said, An old guy came from a far away village requested a mission to eliminate 500+ goblins, He paid 37 gold coins for the quest completion, which is a a lot for slaying those goblins, so lots of magic knights accepted the quest but, Unfortunately those knights didn't came back from that mission. There's no letter, nor any communication after they went to that village. And that old guy came about a week ago, ' so even if i hurried to that village, there's no way to save them from that monster ', This is the second time that I failed to save a person's life, first; the girl from my previous world, and now those poor villagers. if I can just return to the past and do those things, maybe, just maybe, there won't be people like Hina who's sad for their deaths. Unfortunately there's no information about the old guy who requested the mission, he didn't say his name, nor his age, He just have the money and give the orders then he left immediately. A Creature who has intelligent of a human; but doesn't have any bones on its body. What could it before?, What Creature it is?, Those are the questions I need to answer.