Another interesting concept is to set the fanfic in an alternate universe where the Bride of Discord has different powers or origins. This would allow for a fresh take on the character and her role in the story. You could explore how these new aspects of her character interact with the existing lore and characters.
One idea could be exploring how the Bride of Discord affects the relationships between the main characters in the original setting. For example, if she creates chaos in their friendships or romantic relationships.
One interesting aspect is the unique character dynamics. Discord is a chaotic character, and in a fanfic centered around his 'bride', it can lead to really unexpected and humorous interactions. For example, his attempts to court in his own chaotic way can be both funny and endearing.
One idea could be that Discord causes chaos in Equestria that the MLP characters have to solve in a really wacky way. For example, he might turn all the clouds into cotton candy and the ponies have to figure out how to make it rain again without making a huge mess. Another plot could involve Discord getting his powers mixed up with a unicorn's magic and they have to work together to undo it. Maybe he accidentally gives Twilight Sparkle the power to turn things into random objects every time she tries to use her normal spells.
Another plot idea could be a love triangle within the Titan world involving the bride. There might be a powerful Titan who is jealous of the relationship between the main Titan and the human bride, and this jealousy could lead to a series of events that put the relationship and the Titan society in jeopardy.
One idea could be creating an OC who is a half - human, half - spirit from a long - lost tribe. This OC could have unique magical abilities related to nature, like being able to communicate with ancient trees and control the growth of plants. Another idea is an OC that was once a servant of an evil mage but broke free and is now seeking redemption in the world of 'The Ancient Magus' Bride. They could have dark powers that they struggle to use for good.
One idea could be exploring Chise's past more in - depth. Maybe she had some hidden magical experiences as a child that she has forgotten. Another could be a story where Elias has to face a powerful magical threat that endangers not only Chise but the whole magical world. It could also be interesting to write a fanfic where Chise and Elias travel to a different magical realm and encounter new and strange creatures.
One interesting 'Daughter of Discord fanfic' could be about her exploring different realms and causing chaos in a humorous way. For example, she might accidentally turn a peaceful pony village into a place full of floating objects and rainbow - colored fog.
Pinkie Pie might also be a good choice. Since Pinkie is already a bit of a wild card herself, her interaction with the Bride of Discord could either result in double the chaos or Pinkie Pie somehow taming the Bride's chaos in her own unique, zany way.
Well, obviously Discord is one of the main characters. He brings his chaotic and powerful nature to the story. Then there's the 'bride' character, who could be an original creation or an existing character from the MLP universe given a new role. For example, it could be a mare who catches Discord's eye in a unique way.
One common theme is chaos. Since Discord is the spirit of chaos, fanfictions often revolve around how the bride deals with or even thrives in a chaotic environment. Another theme is love. Many explore the relationship between Discord and his bride, whether it's a traditional love story or a more complex, unorthodox one.
Maybe Discord tries to form an alliance with one of the factions in the Twilight world, like the vampires. He could offer them his chaotic magic in exchange for something, but his true motives are always a mystery and this causes a lot of internal conflict within the vampire coven.