The Real Culprit - Dark Mist Legion

The one who tampered with Tina's medal was a craftsman named Ryan-forced into it after the Dark Mist Legion took his family hostage.
This reveals the true culprit: the Dark Mist Legion, agents of Witch Hruga.

Once an elite unit of the Byrnhald Knights, the Legion refused to return after the Independence War.
Instead, they remained near Asterleeds, launching repeated attacks. Their leader, Denvel, a former knight, bears deep hatred toward the city.