Fallen is unique enemy to the Hell Dungeon inside of Urzon Citadel. This enemy can be meet only during the Ultimate Good Ending.
Strategy[]
This is an airborne enemy who will vanish and reappear. They will charge and shot projectiles at player. When attacked they will attempt to vanish to only reappear later.
Weakness[]
If continue to attack them, enemies vanish animation will be interrupted. You can keep attacking them until they die.