One idea could be that the OC is a new student in the killing game. Celestia initially sees the OC as an easy target to manipulate but gradually finds herself intrigued by the OC's unique personality. They could form an unlikely alliance where they work together to solve the mysteries of the game, and in the process, Celestia starts to develop real feelings for the OC.
Character development is key. For Celestia, show how her relationship with the OC changes her. Maybe she becomes a bit more vulnerable or starts to question her own actions. For the OC, show how they grow in this dangerous and strange environment with Celestia by their side. Also, use dialogue effectively. Celestia has a very distinct way of speaking, so mimic that in your writing. And don't forget to have a clear plot structure. Start with an introduction that sets up the situation, have a middle part full of rising action and relationship development, and end with a satisfying conclusion, whether it's a happy ending or a tragic one depending on the tone you want to set.
In fanfic, Yumeko is often depicted as bold and fearless. She's not afraid to take risks, especially when it comes to gambling. Mary, on the other hand, is usually portrayed as more calculating and strategic. She thinks things through carefully.
In Kakegurui fanfiction, Ryota and Yumeko's relationship is a fascinating subject. Yumeko's insatiable appetite for gambling and her unique charm make her a central figure. Ryota, on the other hand, is often in a position of trying to understand her. Their interactions are filled with tension and drama. The fanfiction can play with their differences in personality. For example, Yumeko's impulsiveness against Ryota's more reserved nature can lead to some really engaging storylines. It could be that Ryota is gradually influenced by Yumeko's way of life, or he tries to change her for the better. There are so many possibilities in exploring their relationship through fanfiction.
Common themes in their fanfiction include the idea of redemption. Maybe Ryota is trying to redeem Yumeko from her extreme gambling ways, or vice versa. Another theme is the battle between logic and instinct. Ryota represents logic most of the time, while Yumeko is all about following her instincts in gambling. And there is also the theme of loyalty. How far will Ryota go to be loyal to Yumeko, and how will she respond to his loyalty? These are all things that are often explored in fanfiction about them.
A common theme is rivalry. Since they are often pitted against each other in the original context, fanfics play on this dynamic, showing how their competition can also be a form of connection.
In the manga, Yumeko and Ryota don't end up together. The story focuses more on the gambling scenarios and character developments rather than a romantic ending for them.
The fanfic 'Yumeko and Mary's Shared Journey' is quite interesting. It focuses on their journey of self - discovery while also strengthening their relationship. It has some really heartwarming moments as they support each other through various challenges.
I've heard of 'The Yumeko - Mary Encounter'. It begins with a chance encounter between them and then explores how their personalities clash and yet also complement each other, leading to a unique and engaging story.
Celestia is known for her wisdom and grace. She is very powerful as she is able to raise the sun every day. She has a kind and patient nature, always ready to guide her subjects. Luna, on the other hand, is more mysterious. She has a connection to the night and the stars. Once she overcame her dark phase, she became a symbol of the night's beauty and tranquility.