Fire Giant

Fire Giants are a race of giants that can be found in YGGDRASIL.

Background
In YGGDRASIL, Touch Me noted that the boss monster of Fire Giants was said to be Surt. According to him, this boss dropped rare materials like Primordial Fire from killing one.

When Ainz Ooal Gown was still consider an active guild at some point, Momonga informed his friends to arrive early on time since he is planning to assemble the members of the Fire Giants hunting party.

Abilities
Just as their name suggests, Fire Giants are immune to the element fire or any flame-like attacks used against them.

Trivia

 * In the Web Novel, according to Ainz, there exists an unknown guild with ownership of the field which spawned Fire Giants in Muspelheim. It was said to be among the three guilds that rivaled Ainz Ooal Gown.