A great concept could be a crossover with another fantasy - based anime. The magic systems and cultures of both could blend in unique ways. For instance, if 'kyo kara maoh' crossed with a show about elemental magic, the characters could learn new magic skills from each other and use them to fight a common enemy that threatens both worlds.
The main character, Yuuri, would definitely be exciting. His unique personality and his role as the Maoh make him a central figure. He could bring his leadership skills and his ability to adapt to new situations into the crossover.
She may also be forced to defend herself. Given her powers, she could use her super - speed or super - strength to avoid Clark's attacks. And she would probably be hurt, not just physically but also emotionally, because Clark's actions would be a betrayal of their relationship.
Kara Tippetts was a person who was facing a terminal illness. She was someone who had a journey that was full of challenges due to her health condition.
I'm not sure specifically as I haven't read this particular fanfic. But generally, it might involve the relationship between Yuki and Kyo, perhaps exploring their interactions, emotions, and development in a fictional scenario.
One common theme is rivalry. In the original source material, they might have a bit of a competitive relationship, and this often gets explored in fanfics. They might compete for the attention of a certain character or for a position in some group.
One of the often - seen themes is adventure. They usually go on some sort of journey together, whether it's to defeat a powerful enemy or explore a mysterious place. During these adventures, their bond deepens. Also, there's the theme of mutual understanding. At first, they might not get each other, but as the story unfolds, they come to understand and accept each other's quirks.