I'm not sure specifically what the 'Archeron Secret Red Story' is as it's not a well - known common story. It could be something very specific to a certain group, region or even a made - up concept by an individual.
I really liked 'Pregnant Feyre's Trials'. This fanfiction focuses on Feyre facing different challenges while pregnant. It shows her strength as she deals with court politics, threats from enemies, and still manages to take care of herself and her unborn baby. It's a story that shows Feyre's character development in a unique situation.
The plot involves Rimuru's journey from being a rather weak (initially) slime to becoming a very powerful being. He meets many interesting characters. For example, there are the goblins he befriends early on. Rimuru helps them improve their living conditions. As the story progresses, he also has to deal with the threat of other more powerful monsters and even some human kingdoms that view his growing power with suspicion. In general, it's a story full of adventure, growth, and the forging of relationships in a magical and dangerous world.
The main character is Rimuru Tempest. He is a slime who has unique powers and a great deal of charisma. Another important character is Veldora, the storm dragon who befriends Rimuru. There is also Shizu, a human who has an impact on Rimuru's early development. And then there are characters like Benimaru, a powerful ogre who becomes one of Rimuru's loyal followers.