Fire Elementals are magical creatures usually summoned to fight in a battle, as their intellectual capabilities are too limited for other purposes. They are slightly taller than humans and are as strong, but are difficult to defeat with common weapons due to the excessive heat that their body emanates. As a response to that strength, they are extremely vulnerable to water, which can extinguish them.
Sarus the Fire Wizard often summons them on battlefields. One such occasion was during the battle at Gewa versus General Tahoi, where his Fire Elementals had crippled the majority of the Royal Army.