JKSManga
Yes Andrew wasn't killed and we have another blood fairy guess this confirms that having turned change each other has a higher possibility of turning them into the same sub class. So the demon tier can get stronger by absorbing energy and it uses it to make slots. Wonder If they are used to control a target, but even with that I don't think Quinn could use them to finish the quest as he would still need to take control of stronger targets. Also Quinn is on a different planet from Helen now right. He also has no shadow user to teleport back if the Graham goes there next.