He along with his Mystic brothers originally served the Demon Shredder better known as the Tengu Shredder. After his master's defeat he and the other Mystics were forced to serve the Utrom Shredder Ch'rell.
The Fire Mystic was one of five elemental entities who served the Demon Tengu Shredder who caused chaos and war across feudal Japan. The other Mystics were known as the Water Mystic, Metal Mystic, Earth Mystic and Wind Mystic.
After the Demon Shredder was defeated by the Ninja Tribunal and locked away in a special built coffin. The Fire Mystic and his brothers were later put under control by an amulet known as the Heart of Tengu, the amulet was later stolen by Ch'rell an evil Utrom alien criminal who stole the name of the Shredder to take control of the Foot Clan and take over Japan. armor
The Fire Mystic and his brothers were placed in special armor which limited their true power. The five Mystics hated serving Ch'rell the Utrom alien who took the name of the Shredder after taking control of the Foot Clan. Although he and his brothers despised Ch'rell the Utrom did have respect for them. When the Utrom Shredder was defeated by the Teenage Mutant Ninja Turtles and exiled by the Utroms to a faraway ice asteroid, Ch'rell's adopted human daughter Karai took command of the Foot Clan and badly abused the Mystics.Karai tells them that as long as she had the Heart of Tengu, their powers were her to command. But it did not take long after their mistreatment at the hands of Karai that they became more determined to free themselves and after tricking Agent Bishp, and the TMNT by proxy, into stealing the artifact, the Mystics themselves allowed the TMNT to pass into the new Foot Tower. The Mystics broke free of Karai's grip when Baxter Stockman destroyed the artifact and they began to attempt to resurrect the true Demon Shredder. When freed the Mystics were able to revert back to their true forms and were shown to be far more powerful then previously shown. They then return to Japan, defeat the Ninja Tribunal and resurrect the one true Shredder, Despite their fanatical devotion to the Demon Shredder, they were still abused by him for so much as saying anything he felt was out of line. The Fire Mystic was eventually killed in "Enter the Dragons, Part 1" by Raphael and Joi Reynard.
The Fire Mystic can create large flames and fireballs that packs burning touch and explosive power. He can also change his body form into different shapes and sizes.