The theme of identity crisis is quite common. Rose has been human for so long, and suddenly becoming a Time Lady shakes her sense of self. Also, themes of love and friendship are prevalent. Her relationship with the Doctor, of course, but also new friendships she forms with other Time - related beings. And then there's the theme of power. As a Time Lady, she has great power, and how she uses it - for good or bad - is often explored in these fanfictions.
One common theme is Rose's struggle to adapt to her new role as a Time Lady. It's about her learning the powers, responsibilities, and the culture of the Time Lords. Another theme is her relationship with the Doctor in this new context. How their dynamic changes with her new identity.
One of the main themes is power. Rose gains a great deal of power as a Time Lady, and how she uses it, whether for good or bad, is often explored. Family is also a theme. She may find new family in the Time Lord community or redefine her relationship with her human family. Additionally, the theme of identity crisis is prevalent. She was once human, and now she's a Time Lady, so there's a struggle to reconcile those two parts of herself.
A common theme is redemption. Since Summer Rose is often a character with an unclear or tragic past, time travel can be used as a tool for her to make amends or correct her past mistakes.
Growth and change. The story could show how they both grow as individuals through their relationship. Their first time might be a milestone in that growth, where they become more confident and self - aware. For instance, Rose might become more open - minded about different types of wizards, and Scorpius might gain more courage to stand up for his relationship.
Often, themes like adventure, time travel paradoxes, and emotional bonds between characters are common. The exploration of alternate timelines and the power of the Time Lady are also popular.
The idea of different timelines is also a common theme in '10 and Rose fanfiction'. Writers often play with the concept of alternate timelines where their relationship might have taken a different turn. It could be a timeline where Rose becomes more like the Doctor in terms of her knowledge and abilities, and how that affects their relationship.
Love or at least a deep affection might also be a theme. The writers could explore a romantic relationship between 9 and Rose or a deep platonic love that is so strong it rivals a romantic one. They could be in a situation where they have to fight for their relationship against external forces, adding drama and tension to the story.
One common theme is adventure. They often go on exciting travels through time and space in these fanfictions. For example, exploring unknown planets or different historical eras.
One common theme is fixing past mistakes. Since they can time travel, they often try to change things in the wizarding world's history that went wrong. Another theme is exploring family relationships. For example, how Albus and Rose's actions might affect their families in different time periods.
Conflict is also often seen. It could be external conflict, like they are against some common enemy, or internal conflict, such as one 'rose' having doubts about their relationship with the other. This conflict then drives the plot of the fanfiction forward and makes the story more interesting.
Love is a common theme. Often it's about Amy's love for Sonic or other characters. Another theme is friendship, showing how she interacts with her friends in different situations.