I'm not sure as I haven't read it. But usually, there would be the cautious hero himself, and probably some friends or allies who either support his cautious ways or try to push him to be bolder.
Since it's a 'Cautious Hero Novel', the main character is of course the cautious hero. There might also be a mentor - like figure who tries to guide the hero in his cautious adventures. And there could be an antagonist who is in contrast to the hero's cautious nature, perhaps being very impulsive and rash, which creates interesting conflicts in the story.
Well, there's Seiya Ryuuguuin, a really powerful hero. But he's not your typical hero because of his extreme caution. Then there's Ristarte, the goddess. She's the one who brings Seiya to the other world. Their interactions are key in the story. There are also other characters like the demons and the people in the other world that Seiya and Ristarte encounter during their adventures, but Seiya and Ristarte are the central figures.
Since it's an overly cautious hero light novel, the central character is the hero with his cautious disposition. There may be fellow adventurers or comrades who are part of his team. These characters could have different personalities that contrast with the hero's cautiousness. For example, there could be a bold and impulsive character who often clashes with the hero's more measured approach. There might also be a mysterious figure who appears throughout the story and has some connection to the hero's past that further influences his cautious behavior.
There is Seiya Ryuuguuin, who is the overly cautious hero. And then there is Ristarte, the goddess who summoned him.
Well, the cautious hero himself is obviously a very important character. His unique personality and cautious approach drive the story.
He might have had some bad experiences in the past that made him cautious. Maybe he once faced a near - death situation due to being reckless, so now he is overly careful.
The plot mainly follows Seiya Ryuuguuin, a hero summoned to another world. He is extremely overpowered but also overly cautious. He prepares for every little danger meticulously, which often leads to comical and unexpected situations as he embarks on his quest to save the world from the Demon Lord. For example, he might spend days preparing for a battle against a relatively weak monster just to ensure absolute victory.
One of the main themes is heroism. It shows how a cautious hero approaches the challenges of being a hero in a different way compared to the typical bold heroes.
The hero might be overpowered due to some special abilities or powers he was born with or acquired. For example, he could have super strength, magic powers, or extraordinary intelligence. And he is overly cautious perhaps because he has experienced great losses in the past when being reckless. So now, even with great power, he still thinks twice before acting to avoid repeating the same mistakes.
It could be that the nature of the world in the light novel is very unpredictable. There could be hidden enemies or powerful forces that even an overpowered hero would be wary of. So, in order to protect themselves and those they care about, they choose to be cautious. For example, there might be ancient curses or prophecies that target powerful individuals like the hero. And the hero, being aware of these potential threats, acts with caution.
In some manga and anime, characters like Shinji Ikari from 'Neon Genesis Evangelion' can be seen as overly cautious heroes. He is often hesitant and afraid of piloting the Eva, but his journey throughout the series is about slowly facing his fears and becoming more confident in his role as a hero, despite his initial overly cautious nature.