Four were bronze grade, and one was only gold grade. This one was Oliver. He was the same fellow in Sith's old team. As William experienced how capable Oliver was, he appointed him as the leader of all the grenade making spirit masters in the guild and his team.
That was of course five years ago. Right now, Oliver was so close from getting to the dark gold grade. While the four others climbed from bronze all the way up to early stages of gold grade.
What delayed Oliver was the same thing that made lots of spirit masters despise and get discouraged about learning a second profession. He wasted his time on learning new stuff from William, ending up stuck in that gold grade for years. But he didn't mind that. In fact, he and others like him were very grateful and feeling blessed to join William.
