Lumin is a character chosen in the thirteenth Offering. He worked in the castle's "tech department" and worked there with electronics. He, along with Hari, Mira, and Porter, were working with the electronics in the fourteenth Offering when a couple of Offerings were assigned to work with technology too. However, when Silver Blackthorn started her assignment there in the fifteenth Offering, they were no longer were alive.
Lumin wasn't very kind to Silver when she began her assignment in the department.