A common theme is sisterhood. Given their relationship as sisters, many fanfics explore the deep bond between them, including how they rely on each other and support one another in ruling Equestria.
One great fanfic could be 'Sisterly Bonds' which focuses on their relationship and how they support each other through various challenges in Equestria. It beautifully showcases their different personalities while emphasizing their deep connection.
Princess Celestia can raise the sun, has strong magic for ruling and protecting Equestria. Princess Luna can raise the moon and also has magic related to the night, like controlling the stars.
Princess Celestia is the ruler of Equestria, responsible for raising the sun. Princess Luna was once envious and turned into Nightmare Moon. Celestia had to banish her to the moon. But later, Luna was redeemed. They both play important roles in maintaining the balance of day and night in Equestria.
One great MLP Princess Celestia fanfic is 'The Sun's Daughter'. It delves deep into her backstory and her relationship with Luna. It shows a more vulnerable side of Celestia which is really interesting.
They often interact as teacher and student. Luna, with her vast knowledge of the old magic, can teach Twilight things that are not found in modern magic books. For example, Luna might show Twilight how to communicate with the spirits of the night.
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.
It could be another powerful magical being. Maybe a long - lost love from another dimension who has the power to traverse realms and had a brief but passionate encounter with Celestia.
One common theme is mentorship. Since Celestia is a wise and powerful figure, she often takes on the role of mentoring the reader in fanfics. Another theme is adventure. The reader usually goes on some sort of adventure with Celestia, whether it's exploring Equestria or a more magical realm. Friendship is also a big theme, as the relationship between the reader and Celestia develops into a strong friendship in many of these fanfics.
Writing fanfiction about a non - human character like Princess Celestia and a human can be a creative and interesting concept in the realm of fan creativity. However, it should be done within the boundaries of good taste and respect for the source material. If it involves inappropriate or unethical themes, then it is not appropriate.