If I learned anything from watching Dragon Ball Z its get out of the way when someone is glowing. When you glow, you’re charged up and in Fire Emblem: Awakening that means its time for a class change.
You can’t simply level up into a new class, though! You need a Master Proof item which will let you switch into an upgraded class. As seen in the video Armor Knights can either become a General or a Great Knight. Fire Emblem: Awakening also lets characters change to different classes if you acquire a Change Proof. This allows opens up new character growth paths like switching your honorable Armor Knight to a Thief.
Fire Emblem: Awakening comes out on April 19 in Japan.