Maybe there's a group of villagers. In many such stories, ordinary people often find themselves facing the demonic threat. They might be the ones who have to come together to face the demon in the dark.
Since I don't know the exact 'demon in the dark story', it's hard to say. But it could be a brave hero who tries to fight the demon.
Obviously Naruto would be one of the main characters as it's in his name. And probably the dark demon itself, which would have a major role in driving the story.
I'm not sure exactly as I haven't read the specific 'In a Dark Dark Wood Story' in detail. But it could have a protagonist who is lost in the dark wood. Maybe there's also some kind of guide figure, like an old hermit or a magical creature that helps the protagonist find their way.
Since I have no knowledge about this story, it might have a brave explorer as one of the main characters. Maybe there's also a wise old hermit living in the wood who helps or hinders the main character's journey.
I'm not sure specifically since we don't have more details about this story. But it could be a lost traveler who is trying to find his way out of the forest.
Maybe there are a group of children as the main characters. They might be playing near the woods and end up getting lost in the 'dark dark woods'. Their naivete and curiosity could be central to the story as they try to find their way out while also being afraid of the unknown in the woods.
Without more knowledge of the 'black demon story', it's a bit of a guess. It could be that there is a family that is being terrorized by the black demon. The parents trying to protect their children, and among the children, there might be one who has a special connection or ability that could potentially be used to fight the black demon. Or perhaps there is a solitary hunter - type character who has made it his mission to track down and destroy the black demon.
The main characters in the 'demon days story' could be diverse. There could be a group of survivors who have banded together during the demon days. Among them, there might be a brave warrior who is skilled in combat and not afraid to face the demons head - on. There could also be a mysterious seer who can foresee some of the events related to the demons and helps the group make decisions. And then there are the demons themselves, which might have different personalities and motives. Some demons could be more bloodthirsty, while others might be more calculating and have their own long - term plans for the demon days.
Typically, there is the human who becomes involved with the demon lover, and of course, the demon lover itself.
In the 'demon lover story', the main characters usually consist of the demon lover, which could be a male or female demon with different abilities and motives. The other main character is the human who becomes entangled in the demon's world. This human might be an ordinary person living an ordinary life until the demon enters their life, bringing chaos, love, or a mix of both. There could also be other secondary characters like friends or family of the human who react to the situation in different ways, either trying to protect the human or being afraid of the demon.
Since I don't know the actual story, it's difficult to say. But it could be the character with the 'dark craving' and the 'dark king' himself.