One common theme is the power struggle. Students often have different levels of magical power, which leads to competition and sometimes envy among them.
One of the main themes is the concept of being an 'irregular' in a highly structured magic society. It shows how the protagonist, Tatsuya, stands out and challenges the norms. Another theme is family and loyalty, as Tatsuya's relationship with his sister plays a significant role. Also, power and politics within the magic high school and the broader magic community are important themes.
A prevalent theme is also crossovers. Since it's a fanfiction combining Highschool DxD and Magic Knight, there are a lot of crossovers where the worlds and rules of the two series interact. For example, the magic systems of Magic Knight might be incorporated into the world of Highschool DxD, creating new and exciting storylines. And of course, the theme of adventure is also common as the characters embark on various quests and battles.
Adventure and exploration. These novels usually involve knights going on quests, exploring dungeons filled with magic traps and creatures. They face unknown magic and have to adapt to it. For example, in many novels, they might encounter a new type of magic crystal that has special powers but also poses great danger.
The relationship between humans and the supernatural is a big theme too. Magic and alchemy in these light novels blur the line between the natural and the supernatural. Characters interact with magical creatures, use enchanted items, and try to understand the laws that govern this supernatural world of magic and alchemy which often reflects on their own humanity.
Adventure is also a big theme. Protagonists usually embark on a journey, exploring unknown lands filled with magic and facing various challenges that require both their sword - fighting and magical abilities. They might be searching for powerful magical items or trying to defeat a great evil.
One common theme is self - discovery. The OC often enters the world of the Host Club not fully knowing themselves and through their interactions with the club members, they learn more about who they are. For example, in many fanfictions, the OC discovers new magical abilities or aspects of their personality.
Friendship is a very common theme. Students form close bonds and support each other through good and bad times.
Growth is also a typical theme. The wielder of healing magic usually goes through personal growth. They might start as a novice, not fully understanding the power they possess. As they use their healing magic to help others, they grow in confidence, skill, and understanding of the world around them. Like in a story where a young healer in a small village gradually becomes known across the land for their powerful and wise use of healing magic.
Power and growth. Usually, the protagonists start out weak in a world full of swords and magic and strive to become stronger. For example, in 'The Rising of the Shield Hero', the hero has to overcome many challenges to gain power.
One of the main themes is competition. In the story, students constantly compete with each other in various aspects, such as academics and social status. Another theme is the exploration of human nature. We can see different characters showing different sides of human nature, from kindness to cunning. Also, there is a theme of class struggle as there are clear hierarchies among the students.