Yes. Korg is a comic book character. His presence in comics has led to his appearance in other forms of media, and he's become quite recognizable among comic enthusiasts.
One common theme could be friendship. They might start as friends and gradually develop deeper feelings for each other. Another theme could be adventure. For example, they could be on a quest together and their relationship evolves during that journey.
Well, I'm not sure of a specific Yuri x Aram fanfic off the top of my head. But you could try searching on some popular fanfic platforms like Archive of Our Own. There are often many different fanfics for various pairings there.
Definitely not. Manhwa comes from Korea. It has unique features that set it apart from Chinese comic works in terms of art style, storylines, and cultural influences.