I'm not sure specifically as there could be many different 'shiraori web novels'. It might be about various things like adventure, fantasy, or relationships depending on its genre.
Among the main characters besides Rimuru are Gobta. He is a goblin who is rather comical at times but also shows growth throughout the story. Then there is Diablo, a very powerful demon who becomes Rimuru's subordinate. His power and knowledge contribute to Rimuru's rise in the world of the novel. There are also other characters like Milim, a dragonoid with a child - like personality who has her own impact on the overall plot.
The Shiraori light novel might have unique characters. For example, the main character could have distinct personality traits that draw readers in. Maybe it has an interesting plot filled with twists and turns.
I'm not entirely sure as I haven't read it thoroughly, but usually in light novels, there is a central protagonist. In this case, Shiraori might be the main character or there could be other key characters who play important roles in the story's development.
Milim Nava is an interesting character. She is a powerful Demon Lord with a child - like personality. She often gets involved in Rimuru's adventures in unexpected ways. Then there's Shion. She is a hobgoblin with great loyalty to Rimuru. Her over - the - top reactions and her growth in strength and character add a lot of fun to the story.
There's Veldora. He's a powerful dragon sealed within Rimuru's stomach at first. His presence has a great impact on Rimuru's growth and the story. Then there's Shion, a strong ogre who becomes one of Rimuru's loyal followers. She's known for her combat abilities. Also, Benimaru, a kijin, is an important character. He plays a key role in the development of Tempest.
Rimuru is very strong in the manga. He starts off with some unique abilities and keeps getting stronger through different events and encounters. His strength is not just physical but also in his strategic thinking and leadership skills.
One of Rimuru's notable feats is his leadership in building his own nation. He manages to bring together different races and create a harmonious society. This shows his charisma and intelligence in governance. Also, his combat feats are remarkable. He can use his unique slime abilities in creative ways during battles, like forming various weapons and defenses out of his slime body.