Action is a main theme. There are likely many fight scenes and high - energy chases.
Survival is probably also a key theme. In a world full of challenges and enemies, the protagonist has to use his wits and skills to stay alive. In this novel, he might face many life - threatening situations and has to fight his way out, which shows the theme of survival very well.
Another theme could be loyalty. The soldier might have to deal with situations where his loyalty to his comrades, country or certain ideals is tested.
One similar novel could be 'The Bourne Identity' - type novels. They also feature a main character with special skills and a lot of action - packed scenarios.
The main characteristic is probably the complex relationship between the evil king and the wicked consort. They likely have a relationship filled with power struggles.
One of the main themes is fame and its consequences. The characters in the graphic novel, who are gods reincarnated as pop stars, experience the extreme highs and lows of fame. Another theme is mortality, as these gods are not truly immortal in their current incarnations and face the threat of death. Also, there is a theme of power and how it corrupts. As the gods have different powers, they often use them for their own gain or to manipulate others.
One of the main themes is the nature of divinity and what it means to be a god. Another could be the price of power and fame as the characters who are gods in the story also face many challenges. Also, mortality and immortality play a role as the gods have limited time in their divine forms.
I'm not sure specifically as I haven't read it in detail. But generally, it might be about the actions and adventures related to the wicked king in this bonus part of the story.
Love could be a main theme. It might explore different types of love relationships within the context of the 'wicked stars' universe.
Power and leadership are common themes. The main character, as a soldier king, usually has great power and is in a position of leadership.
Power struggles could be a common theme. Since it's about a 'wicked king', there might be battles for the throne or control over the kingdom.
One common theme is loyalty. The super soldier kings are often extremely loyal to their country, their comrades, or their cause. For example, they would sacrifice themselves to protect their nation.
Another theme might be the consequences of one's actions. If the characters are 'wicked', they are probably dealing with the fallout of their bad deeds, which is why they can't rest. For example, they might be on the run from justice or facing revenge from those they've wronged. Also, competition could be a theme. If it's a game - like situation, they are competing against others in a high - pressure environment where resting means losing.