In Camp Half - Blood fanfiction, Nico di Angelo is a very popular character. His dark and brooding nature, along with his powers over the dead, draw a lot of readers. At Camp Jupiter, Reyna is often a central figure. She's strong, independent, and has a lot of leadership qualities, which make her a great character in fanfiction stories.
Jupiter Legacy indeed originated as a comic. The comic provided the foundation for the subsequent adaptations and developments in other forms of media.
The story 'The Moons of Jupiter' by Alice Munro may be centered around human emotions and experiences. Munro often delves into the complex feelings that her characters have. It could be that the story follows a character or a group of characters who are at a crossroads in their lives. The mention of the moons of Jupiter could imply a sense of vastness and mystery. Maybe the characters are trying to understand something bigger than themselves, like how the moons orbit Jupiter in a complex and fascinating way, and this could be paralleled to their own attempts to navigate their lives.
Jupiter Ascending isn't based on any pre-existing book or comic. The story was developed specifically for the movie, with its own unique plot and characters.