It usually happens when the manga gains a lot of popularity and catches the attention of anime producers. They see the potential for a successful adaptation and start the process.
It usually starts with a production company buying the rights to adapt the manga. Then, a team of animators, directors, and writers work together to translate the static images and story of the manga into a dynamic animated format.
Gilgamesh obtains a profound realization about the nature of existence and the limits of human striving by the story's end. He comes to terms with the inevitability of death and the value of the experiences he's had.
Yes, there could be some anime - inspired works that take the concept of a female Gilgamesh. Some independent or niche anime creators might play with the idea of reimagining the Gilgamesh character as female and build stories around it. However, it might not be a mainstream concept.
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.
Most manga don't make it to anime. It takes a lot for a manga to get picked up for an anime adaptation. Things like having a wide fan base and a story that suits animation production are crucial.
First, you need to decide what you're ranking. It could be characters, story arcs, or even the settings in Anime Adventures. Then, consider the criteria for ranking. For characters, it might be their growth throughout the story, their power level, or their importance to the overall plot. Once you've determined the criteria, start ranking them into different tiers, like S - tier for the best, A - tier for very good, and so on.
I think it ends with Gilgamesh to emphasize his growth and transformation throughout the story. It shows that his experiences have led to a significant change and this ending is a way to highlight that. Also, it could be to leave a lasting impression on the readers/viewers.