There might be an antagonist who is really interesting. Maybe it's another god who is jealous of the protagonist's new - found divinity or has different ideas about how the world should be run. Their clashes with the protagonist can create great drama. Also, any mortal characters who interact with the god - protagonist in a special way, like a mortal with a prophetic gift, could be very interesting.
In 'reincarnated as a god web novel', a mentor - like character could be really interesting. If there is a more experienced god who takes the protagonist under their wing, their teachings and the relationship between them can be full of depth. And there could be a sidekick character, perhaps a magical creature, that adds humor and charm to the story.
Fran is one of the most interesting characters without a doubt. Her naivete combined with her fierce determination makes her stand out. The blacksmith in the story is also quite interesting. He helps the sword upgrade and his interactions with Fran and the sword are full of character.
The dragon hatchling itself is quite an interesting character. Its perspective as a reincarnated being in a new form makes it unique. There might also be some wise old dragons that are interesting. They could have a lot of knowledge about the dragon lore and the world in general.
The dragon - like creatures can be quite interesting. They are powerful and have their own hierarchies and cultures. Their existence in the world of the web novel adds an element of danger and mystery. Sometimes they interact with the spider, either as enemies or in some strange alliances. And there are also the small, intelligent goblin - like creatures. They are cunning and resourceful, and their interactions with the environment and other characters make them stand out.
Rimuru is obviously one of the most interesting characters. His transformation from an ordinary human in his past life to a powerful slime in the new world is fascinating. He has a unique personality that combines kindness with a shrewd understanding of power dynamics. Veldora is also interesting. He's a powerful dragon who was sealed for a long time and his interactions with Rimuru are full of humor and unexpected twists.
Rimuru is obviously very interesting. His transformation from a human to a slime and his growth are captivating. Veldora is also cool, a powerful dragon trapped in a cave that Rimuru befriends.
The sword itself is very interesting as it has the mind of a human reincarnated. And the cat - girl is also a great character. She has her own backstory and personality that makes her really stand out.
The cat protagonist is surely one of the most interesting characters. Since it has the mind of a human, its reactions to the world as a cat are unique. Maybe there are also some other animals like a wise old owl or a friendly dog that make the story more interesting with their different personalities and behaviors.
Shion is an interesting character. She's a strong ogre who is extremely loyal to Rimuru. Her clumsy yet endearing nature, especially when it comes to cooking, adds a touch of humor to the story. Then there's Benimaru. He's a very capable leader among the ogres. His respect and admiration for Rimuru, and his own skills in combat and strategy, make him a great addition to the cast.
Well, Fran is really interesting. She starts off as a weak character but with the help of the sword, she grows stronger. Her naivete and determination make her stand out. The sword itself is also fascinating. It has its own thoughts and emotions, which is quite unique for a weapon. And the Demon Lord is an interesting character too, with his great power and the threat he poses to the world.
The dog protagonist itself is surely interesting. It has the mind of a human trapped in a dog's body, which creates a lot of comical and also thought - provoking situations.