Event Name: Can't Look Back
Event Locations: Fieg Snowfields
Required Partner: None
How To Trigger: Enter Fieg Snowfields and speak with Mephianse.
Here's What To Do: Wander around(this place is quite small) until you come across Mephianse and Crystalle. After watching their conversation follow Mephianse and fight the boss. After you win you will receive an item and the event will be complete.