One common theme could be friendship. They might start as friends and gradually develop deeper feelings for each other. Another theme could be adventure. For example, they could be on a quest together and their relationship evolves during that journey.
Well, I'm not sure of a specific Yuri x Aram fanfic off the top of my head. But you could try searching on some popular fanfic platforms like Archive of Our Own. There are often many different fanfics for various pairings there.
Often, they feature intense action scenes as both characters are fighters. Their clashing personalities also make for interesting drama. For example, Iori's brooding nature against Leona's more stoic self.
A new story could be that Leona and Diana are called to a neighboring kingdom to help with a famine. Leona tries to use her sun - based powers to grow crops quickly, but it doesn't work as expected. Diana then suggests using her lunar magic to find underground water sources. They work together, with Leona digging where Diana indicates. Eventually, they find enough water to start irrigating the fields, and the famine begins to subside.
Once upon a time, Leona and Diana were in a forest. They were on a quest to find a magical crystal. Leona used her solar powers to light up the dark paths, while Diana relied on her lunar magic to sense any hidden dangers. Along the way, they had a small argument about which way to go. But soon they realized that they needed to work together. Finally, they found the crystal, which had the power to heal the sick in their land.
In Leona x Ruggie fanfiction, a really popular trope is 'mutual understanding'. Despite their different backgrounds and personalities, they come to understand each other on a deeper level. This could be through shared experiences or just by spending a lot of time together. Another is the 'unlikely allies' trope, where they have to team up against a common enemy or problem in the Twisted Wonderland universe. This trope often leads to a strengthening of their relationship and sometimes a romantic development.
The 'Leona and Diana' short story often involves their complex relationship. Leona is a proud and strong character, while Diana has her own beliefs and powers. They may start as rivals, perhaps due to differences in their views on power or leadership in their world. Their story could include battles, moments of understanding, and a journey of self - discovery for both of them.