Gilgamesh can be portrayed as a powerful and haughty figure. He could walk around the world of Danmachi with an air of superiority, looking down on the 'lesser' adventurers. His flamboyant style and his love for grandeur can be emphasized, like always wearing the most elaborate and expensive armor.
A plot for Gilgamesh Danmachi fanfiction might be that Gilgamesh discovers a hidden part of the dungeon that has a connection to his past. Maybe it contains ancient artifacts or secrets related to his origin. As he delves deeper, he has to team up with some of the local adventurers from Danmachi. They are initially skeptical of him but soon realize his power and knowledge are invaluable. Together, they face various challenges and traps, and Gilgamesh also has to deal with his own internal struggles as memories from his past start to resurface.
The Epic of Gilgamesh was one of the famous works of ancient Chinese literature and an important chapter in the history of world literature. The following is the translation of the full text:
The Epic of Gilgamesh was a work of ancient Chinese literature. It was a biography of Khan Gheng Khan in ancient China. The epic was written in the 10th century B.C. and recounts the heroic deeds of Khan Gheng Khan in conquering Central Asia and South Asia. The epic had an important position in Chinese culture and was regarded as one of the representative works of ancient Chinese literature.
In the story, they start as sort of rivals. Gilgamesh is a powerful king who is a bit wild, and when Enkidu is created, he challenges Gilgamesh. But then they become friends. They share a deep bond that is tested through various trials. For example, when they face Humbaba, the demon of the cedar forest. Their relationship is complex and full of mutual respect in the end, and Enkidu's death deeply affects Gilgamesh.
The graphic novel presents Gilgamesh as a complex character. He is initially a powerful but somewhat tyrannical king. Then, through his friendship with Enkidu, he begins to change and shows more empathy.
He would likely be portrayed as arrogant. Given his status as a powerful and ancient figure in his original lore, in DxD fanfiction he would probably look down on most of the characters. He would act as if he is above the petty squabbles of the DxD world.