A stalwart consigned to the endless cycle of battle, he enjoys dueling with stronger foes.
A knight sworn to face the Warrior of Light. He wields a powerful, adaptive weapon.—Dissidia Final Fantasy description
Firion: “The wild rose. There’s something I’ve been longing to see. That’s the reason I want to end this conflict. Of course, that’s all just still a dream.”
Firion: “Wild roses… My dream is a world filled with wild roses. When the battle is over, I want to fill the world with flowers. A world where we can overcome what we have lost, where even the rain and the wind can provide us with strength…”
Firion: “A flower, hm? Certainly a rare sight. This bloom-what is it
called?”Laguna: “The name of the flower you mean? Um, I’m no expert, but I think that’s a wild rose.”
Firion: “Wild rose?”
Laguna: “Yeah, so I thought. Why? What is it?”
Firion: “Nothing. It’s just…I just feel like I’ve heard those words somewhere before. It’s so frustrating. As if the memory is just out of reach…”
This suggests Cosmos called Firion after he joins the resistance. One scenario is after Leviathan swallows Firion, Maria, and Guy on their way to the Mysidian Tower. But we can rule out after his adventures on his world. With the Emperor defeated, the world sees peace. And in World B, he fights to achieve peace.

Firion: “There are things you can’t discard or give up on…if they realize your dream. I…want to create a world of peace. A world without lives being lost, or people weeping over the loss of a loved one… I’ll make a world where everyone can peacefully gaze upon fields of wild roses!”