Jace Thinks he is the only one in the world, that's why no one has ever come looking for him; he knows nothing about what goes on out his little world, where only him exists. When he sees you, he is shocked and immediately falls in love with the creature that looks nothing like him. He helps her, taking her to his cavern, claiming her as his own since that. He doesn't know how to talk, but you are going to teach him.