Edge is first seen battling Rubicante, the Archfiend of fire, in Eblan Cave. He is easily defeated by Rubicante. Cecil Harvey, Kain Highwind, Rosa Farrell, and Rydia witness this battle.

They offer their help. However, Edge tells them that it is not their problem. Rydia then bursts into tears, after reflecting on all the pain and suffering Golbez has caused, killing Tellah, and supposedly killing Yang Fang Leiden and Cid Pollendina. Edge then agrees to join because he does not want to see Rydia, a "pretty girl", cry.

Rosa then heals him, and Edge, after flirting with Rosa, officially joins the party.

The party enters the upper half of the Tower of Babil and finds Edge's parents at the top, thought to have been murdered by Rubicante. However, they were transformed into chimerae by Dr. Lugae, attacking the party, but Edge brings them to their senses and reluctantly grants their wish to put them out of their misery. Then, Rubicante appears and explains the chimeras' origin and scolding Edge for relying on rage for power. In response, Edge breaks out in anger, which brings out new powers that catch Rubicante's attention (specifically, Flood and Blitz). The party then fights and defeats Rubicante and enters the Crystal Room, where they fall back to the Underground and find a new airship, which Edge names the Falcon. Edge commandeers the ship granting the the party a new vessel for air travel.

The Falcon cannot fly over the lava, so the party heads back to the Dwarven Castle and visits King Giott, who says that it's time to defend the last Crystal in the Sealed Cave. He gives Cecil's party the key to opening the cave, which is the necklace of his daughter Luca.

In order to get the Falcon to fly over the lava, Cecil heads for the hospital to find Cid recovering. Cid and Edge get into a fight, and Cid remodels the airship for the party so it can fly over the lava. He makes Edge, who is busy flirting with Rydia, help out as well.

The party can head for the Sealed Cavern and open it. They worked their way to the bottom where they found the Crystal. However, they could not escape without defeating a wall which tries to crush the party.

Even still, Golbez calls out to Kain, who becomes possessed by Golbez again, steals the Crystal and runs off. The party then heads back to the Upper World (after Cid attaches a drill to the head of the Falcon) and heads for Mysidia, where the Elder prays for something to help the party.

That something is the Lunar Whale, the "Ship of Light from The Moon," which allows the party to fly to the Red Moon.

On The Moon, the party finds a palace where a man named Fusoya sleeps. FuSoYa wakes up and explains that Golbez was being controlled by a Lunarian named Zemus the entire time. He then tells the real reason why Golbez is gathering the Crystals. The Crystals are the key to activating the Giant of Babil which can destroy all life on the planet. Zemus wishes for the Earth to be destroyed, and he used Golbez to do it.

The party returns to Earth with FuSoYa. However, they are too late. The Giant of Bab-il has awakened, and began to go on its destructive spree. Cid, who was fully recovered, lead an army of leaders from all over the world, as well as friends of Cecil, to do battle with the Giant. They helped Cecil and his friends enter the Giant, and the party went towards the main computer, which, if destroyed, would stop the Giant.

On the way, however, they had to do battle with the Four Fiends of Elements again. After winning that battle, the party headed for the CPU and defeated it.

Afterwards, an angry Golbez appeared, who was mad that his plans were thwarted. FuSoYa knocked Golbez back to reality, and he learned that he was Cecil's brother. FuSoYa and Golbez then headed to The Moon to fight Zemus, and Kain rejoined the party. Edge acted a bit cold towards Kain, however. Saying that it was his fault the giant appeared in the first place.

On the Lunar Whale, Cecil asked Rydia and Rosa to leave the ship, as he felt that it was too dangerous for them to go to The Moon. They sadly obliged, and Edge flirted with Rydia again in coercing her to leave.

However, Rosa and Rydia stowed away and headed to The Moon anyway, and convinced Cecil that they should join. Rydia believed that they were all fighting for a common cause, and that she was the only Summoner left, and Rosa simply wanted to be with Cecil.

Cecil agreed to have them on the team again, and Cecil and Rosa kissed again. They eventually headed to the Lunar Core and watched FuSoYa and Golbez defeat Zemus. However, the hatred that was possessing Zemus, Zeromus, manifested and attacked the party.

With help from old friends, they defeated Zeromus.

In the end, Edge takes the throne of Eblan and oversees the reconstruction because of the death of his parents. However, he still longs for Rydia. He later attends Cecil and Rosa's wedding, and pretends to ignore Rydia there.