Since I'm not familiar with the 'His Royal Highness is Hungry' light novel, I can't accurately state the main characters. But we can make some assumptions. The royal highness is probably a main character. There may be a love interest who either helps him deal with his hunger or is affected by his situation. There could also be a wise advisor who tries to guide the royal through the challenges that his hunger presents, whether they are physical, political, or social in nature.
I'm not sure specifically as I haven't read this particular light novel. But generally, a title like this might be about a royal character who is experiencing hunger. It could involve a story where the royal's hunger leads to various adventures, perhaps in a fantasy world where they have to overcome obstacles to get food or deal with the political implications of a hungry royal.
There could be a love interest. In many web novels, a love interest can be a significant character. Maybe he is the one who can finally soothe her anger or is involved in the events that lead to her being angry in the first place.
The most important character is surely the hungry caterpillar. But we can't forget about the things it interacts with. The fruits and food items it consumes play a role too. They are like the little friends or obstacles in the caterpillar's journey. For example, the big leaf at the end where it forms its cocoon is also kind of a character in the story.
Zhan Doudou was the Northern Qi Emperor in " Celebrating Years." In the drama, she was a young emperor who ascended the throne. But as she grew older, she showed her wisdom and foresight, and tried to break free from the Empress Dowager's control and take over the regime independently. In private, she liked reading Fan Xian's books very much and occasionally joked with him. Under the important matters of the country, she also had a young girl's heart. In order to solve the problem of children, she had conspired with Haitang Duoduo and Si Lili to use wine to charm Fan Xian into having children. As for the specific outcome of Qing Yuannian and other related issues, the article did not mention them.
Since I don't have detailed information about the 'hungry heart novel', it's difficult to name the exact main characters. However, in most novels, there are likely to be characters who are in a state of longing or striving for something. There could be a young, ambitious character who is hungry for success and recognition, and then there might be another character who is more focused on emotional fulfillment and is constantly seeking love or friendship.
" Exclusive Favor: Your Highness, please line up when proposing marriage."
Well, clearly one of the main characters is the 'His Highness' figure, who is likely a prince or some sort of nobleman. And of course, the woman whose gender is discovered is also a main character. There might also be other supporting characters like servants, courtiers, or family members of either the prince or the woman, who could play important roles in how the story unfolds after the discovery.
There's no way to tell exactly who the main characters are without reading the 'hungry ghosts graphic novel'. However, if it follows common tropes in stories about ghosts, there could be a young protagonist who is more sensitive to the supernatural. This character might be the one who first discovers the existence of the hungry ghosts and then tries to understand and deal with them. There could also be an antagonist among the hungry ghosts, one that is particularly malevolent and difficult to deal with.
She might give cold glares to those who have displeased her. A single look from her can send shivers down the spines of the courtiers.
It might be due to a thwarted plan. She could have been working on a scheme for the betterment of her kingdom or for her own power - play, and something or someone has stopped it from happening. For example, an opposing political faction has managed to block her proposed legislation. This would surely make her angry.