Melt is RyusoulBlue of the Ryusoulgers and one of the main protagonists of Kishiryu Sentai Ryusoulger.
Alongside Koh and Asuna, Melt received his Ryusoul Changer from his predecessor, Master Blue. When the Druidon Tribe returned to Earth, the Elder of the Ryusoul Tribe explained to Melt, Koh and Asuna how the Druidons had once tried to conquer Earth 65 million years ago and how the Kishiryu were created to fight them, but were sealed away after the Druidons fled Earth. Later, at night, Melt practice-dueled Koh around a lit campfire, but stopped when Asuna questioned if they would have to defend the Ryusoul Temple, as it was the source of their powers. When Koh vowed to fight them, Melt told him not to underestimate them, though Koh replied that with Melt's swordsmanship and Asuna's "brute strength" they would defeat them.
The next morning, a Minosaur Complete Body attacked the Ryusoul Tribe. While Koh and Master Red went to the Ryusoul Temple to defend it, Melt, Asuna and their masters stayed behind to fight the Minosaur. The Ryusoulgers managed to bring the Minosaur down, but before they could finish it off their transformations were cancelled due to Tankjoh attacking the temple. When the Minosaur spewed a fireball at them, Melt and Asuna's masters sacrificed themselves to push their students out of the way.
Despite the Ryusoul Temple being destroyed, Melt managed to regain his Ryusoul powers and bonded with the Kishiryu Triken.