Iguvuarge is the leader of the adventurer group Kralgra. His dream is to become a hero which saved the world, just like the Thirteen Heroes of the past. He subjugated everything to this dream, going as far as spreading false rumors about him or using his companions as meat shield, all stepping stones for him to reach the peak. Yet, he was hardworking and trained intensely which made him intensely dislike Momon who seemingly appeared from nowhere and caught up to his mythril rank in a single adventure.

(Source: Overlord Wikia)