Another example might be 'Steins; Gate'. It involves themes that could be related to a kind of mental 'sickness' in the sense of the characters' obsessions and the consequences of their actions. The time - travel aspect adds to the complexity of the story.
The'sickness' aspect can add depth. For example, if a character has a mental illness, it can create internal conflict. This conflict drives the character's actions and decisions, making the story more interesting.
I'm not sure specifically as I haven't read it. It could potentially be about a king who is ill and the various events and challenges that his sickness brings to his kingdom, his family, and his rule.
Dragon sickness in The Hobbit novel is a kind of greed and madness that overcomes those who come into contact with the dragon's hoard. Characters like Thorin are affected by it. They become obsessed with the gold and jewels, forgetting their values and friendships.
One common theme is the struggle against the illness. Characters often have to fight physically and mentally to deal with the symptoms and limitations the sickness brings.
I don't know as I haven't read the novel. But I assume there would be the king himself, probably his family members like a queen or a prince, and maybe some important nobles or advisors.
There is 'Love Story' which also touches on sickness to some extent. It's about a young couple where the female character is ill. The story shows how their relationship develops in such a difficult situation, with the sickness adding an element of poignancy to their love.
Well, it might be a physical sickness like a terminal disease or a chronic condition. This could drive the plot and add drama to the story. Or, it could even be a metaphor for a societal ailment.