Mysterious swordsman who hides their face behind a mask. Calls themself Marth. First appeared just after Chrom had recruited his most trusted ally, Robin. "Marth" instantly came to Chrom and Lissa's aid when a Risen nearly killed Lissa. However, before Chrom could thank them, they promptly left, warning of greater dangers to come. "Marth" later appeared at a tournament at Arena Ferox as Basilio's champion, but left again after being defeated by Chrom. Attempting to prevent a tragic future.

