One possible theme is identity. The character with a vampires heart and a dragons soul would surely struggle with who they are. Are they more vampire or more dragon? This internal conflict can be a major theme.
Love and acceptance could be themes as well. They may face difficulties in finding acceptance from either the vampire or dragon communities due to their unique nature. And in terms of love, they might search for someone who can love them for who they are, not just be afraid of or attracted to their power.
It could be about the inner struggle of a character who has the traits of both a vampire (with a 'vampires heart') and a dragon (having a 'dragons soul'). Maybe it explores the conflicts between the vampiric nature like a thirst for blood and the dragon's more fiery, passionate and powerful soul.
Power and its consequences could be a theme. Dragons are typically very powerful in Fire Emblem, and seeing through their eyes might show how that power affects their decisions and relationships.
One common theme is the struggle for power. Vampires are often depicted as being power - hungry, and in the school setting, students might vie for positions of power among their peers or against the school's faculty.
Since it's a Naruto fanfiction, it might deal with themes of disillusionment. In the Naruto world, characters often face hardships and betrayals. The 'no longer in autumn' could symbolize a departure from a once - idyllic or nostalgic state. It could also touch on themes of self - discovery as the character's heart changes, perhaps realizing new aspects of themselves or their place in the Naruto world.
One possible theme could be creativity. Since it involves 'design', it might explore the creative process of coming up with something related to a heart. Another theme could be love, as the heart is often associated with love. Maybe the design is of a love - related object or place.
One possible theme could be power. Since it's about a dragon's soul, which is likely to be a powerful entity, the characters might be dealing with the allure and danger of such power.
A theme could be redemption. Maybe the character in the story had made mistakes in the past but through self - reflection and growth, they reached a point where they could say it was well with their soul. Another aspect could be the theme of love, either self - love or love from others, which healed the soul and made it well.
Power and corruption are frequently explored themes. Vampires in these fanfictions are often powerful beings, and their power can lead to corruption. Writers play with how this power dynamic affects the overall Resident Evil universe, whether it's in terms of politics within a vampire - controlled area or how it impacts the remaining human survivors.
One common theme is the eternal struggle for power. Vampires and werewolves are often depicted as competing for dominance in the supernatural world. Another theme is the clash of cultures. Vampires are usually seen as more refined and secretive, while werewolves are more wild and instinct - driven.
One common theme is the struggle with their vampire nature. They often have to deal with the urge to feed and the moral implications of it.