bf!Hellfire AU idea:
AU where bf!Apo is the princess of Thornhelm, while bf!Cherri is her knight.
Apo - Apo is the sole heir to the throne. She has spent her entire life locked away in the castle preparing for the day when she will become the Queen of Thornhelm. Their interactions with people have been very limited, which unfortunately lead to them not knowing how to connect with others. She grew up in a very strict environment that constantly demanded perfection from her and faced consequences when those expectations were not met.
Cherri - Cherri is the princess of Soluna, but doesn’t know this since she was kidnapped when she was just a baby. The king of Thornhelm tried to use Cherri by attempting to make them a loyal fire mage for Thornhelm, but that plan was foiled when they found that it doesn't seem like Cherri can do magic. So then they decide to make her into a knight for the royal family instead. Cherri proved to be a great fighter and very loyal (since it was conditioned into her), so they made her Princess Apo of Thornhelm’s personal guard.
Thornhelm and Soluna have been at war for a long time. Apo, Cherri, and the people of Thornhelm have no idea what really started the war. (It was because Cherri was stolen away.) They have been fed false propaganda and told lies about Soluna. Soluna has been made to look like the villains in their point of view. So when the war manages to breach Thornhelm's borders, both Apo and Cherri are sent away for ‘Apo’s safety’. (The king of Thornhelm doesn’t actually care about Apo, they just need Cherri away from the castle to prevent Soluna from finding the lost princess. So he sent Apo away, knowing Cherri would go with them. That way Soluna won’t dare to kill him since he knows where the lost princess is.)













