In the past, Mattalast was a trombonist who had done gigs in an illegal pub, much to Ireia's disappointment. When he laid eyes on Hamyuts for the first time, he already took a liking to her. When they suddenly engaged in a fight to the death, they became lovers after they realizing their strength against each other. Within a few years of training as an Armed Librarian, Hamyuts surpassed the lower ranks and was deemed the strongest. Fhotona Badgammon, the Acting Director at the time, became suspicious of Hamyuts because of this and ordered Mattalast to eliminate Hamyuts during a dangerous mission to capture an Armed Librarian traitor named Hiza Miken. A battalion under Hiza attacked Hamyuts and Mattalast at night, and while Hamyuts killed the lot of them, Mattalast struggled with his love for her as he attempts to shoot her, but in the end he chose to spare her life.