Another good theme would be their travels to different magical places. They could go on adventures, discover new magical creatures and artifacts, and face challenges together. This would not only highlight their courage but also the special bond they share as they rely on each other in unfamiliar and dangerous situations.
A great theme could be their training together. Imagine them sparring, sharing tips on how to improve their combat skills, and growing stronger side by side. It would show their mutual respect and the trust they have in each other as comrades in the fight against the forces of darkness.
Adventure themes are great. They could go on a quest together to find a powerful magical artifact. This would showcase their skills and their bond as they face various challenges along the way.
One appropriate theme could be their adventures together in the world of the Shadowhunters. For example, their battles against demons and how they support each other during difficult times.
A great alternative is exploring their family relationships. For example, how their family backgrounds influence their decisions and how they deal with the expectations from their families while still being true to their relationship with each other. It can add depth to their characters.
Some appropriate themes could be their adventures together in the Shadowhunter world. For example, how they team up to fight demons and protect the Downworlders. Another theme could be their friendship and how it develops into a deeper relationship based on mutual respect and shared goals.
Love is a very common theme. Since they are a couple in the original series, fanfiction often explores different aspects of their love, like how they overcome obstacles to be together. Another theme is adventure. Fans like to put Jace and Clary in new adventures that are related to their world of shadowhunters.
Adventure is another theme. Given that they are Shadowhunters, many fanfictions continue their adventures, facing new demons and solving mysteries. This not only tests their relationship but also shows how they grow as individuals within the relationship. For example, in some fanfictions, they might have to go on a quest to find a lost relic, and during this journey, their bond either strengthens or is put to the test.
They could focus on their mentorship relationship. For example, Clary learning important skills from Luke like how to handle different magical situations or how to understand the world of shadowhunters better. This would be a positive and character - building exploration.
Love is a very common theme. Their intense, passionate love for each other is often explored in great detail. Another theme is sacrifice. They are often put in situations where they have to sacrifice something for the other.
One common theme is redemption. Jace usually has to atone for his actions that hurt Clary. For example, he might go on a quest to find a way to reverse the damage he's done.
One positive aspect is their loyalty to each other. They always have each other's backs in battles and difficult situations in the non - sexual fanfictions. This shows a deep and abiding friendship and trust.