Maybe it's a story about a brave knight and a princess in an empire. The knight has to prove himself worthy through various heroic deeds in the service of the empire, while also winning the heart of the princess who has her own responsibilities and expectations within the imperial family.
It's hard to say without more information. It could be an emperor and his beloved concubine.
Perhaps there are two young nobles who fall in love. They grow up in the imperial court, surrounded by luxury and power, but their love is challenged by rivalries among other nobles and the strict rules of the empire. They might be main characters in this 'empire love story'.
There could be military leaders. In the story of an empire's end, military leaders play a crucial role. They might be the ones who are winning or losing battles on the front lines. If they are corrupt or not well - trained, it can be disastrous for the empire. Also, there are often the rebels or the people who are dissatisfied with the empire. They might be the ones starting the unrest that eventually leads to the empire's collapse.
In the 'empire star story', the main characters might include a powerful ruler of the empire who sees the star as a symbol of their reign. There could also be a group of rebels who want to use the star's power to overthrow the empire. And maybe there's a wise old sage who knows the secrets of the star and tries to guide the other characters in their actions regarding it.
I'm not sure specifically as I don't have details about this particular 'empire at war story'. But usually in such stories, there would be military leaders, emperors or rulers, and perhaps some rebel leaders if there is an internal conflict.
I don't know specifically as the information isn't given, but it could be the architects or engineers who designed and built the Empire State Building. Maybe it also includes some of the workers who played significant roles during the construction process.
I'm not sure who the main characters are exactly as I don't have detailed knowledge of this specific story. But they could be the leaders of the empire, rebels trying to bring it down, or ordinary people caught in the middle of the chaos.
In the 'empire strikes back story', there are several important characters. Luke Skywalker is central as he is on his path to becoming a true Jedi. Darth Vader, with his imposing presence, is the main antagonist. Han Solo, with his charm and piloting skills, is a key figure. Princess Leia, strong - willed and a leader of the Rebellion. And Yoda, the small but extremely powerful Jedi master, who imparts crucial knowledge to Luke.
Captain America is a major character in it, although his role is quite controversial as he is revealed to be part of Hydra. There are also other heroes like Iron Man, Black Widow, etc.
There could be a powerful dark lord as a main character. He might be the one ruling the empire with an iron fist.
The protagonist is Jim. Alongside him, there are characters like Basie, an American sailor who befriends Jim in the camp. These characters help to shape Jim's journey and experiences in the 'empire of the sun novel'. Each character brings different perspectives and elements to the story, whether it's Basie's more worldly and somewhat cynical view or Jim's naive but evolving understanding of the world around him.
Luke Skywalker is one of the main characters. He has to face the resurrected Emperor. Leia is also important as she gets involved in the fight against the dark side's resurgence.