Power struggle is a common theme. Starscream is often power - hungry in the original Transformers series, and in crossovers, this trait is magnified when he enters new universes with different power hierarchies. For example, in a crossover with the Lord of the Rings, he might try to claim the One Ring to gain ultimate power.
Betrayal is also a frequent theme. Starscream is known for his treacherous nature. In crossovers, he might betray new allies he makes in the other universes. For instance, in a crossover with the Harry Potter world, he could betray those who trust him in Hogwarts in his pursuit of power or knowledge.
Often, there is a theme of innocence lost. As baby Starscream grows, he may face difficult situations that cause him to lose his initial innocence. Also, discovery is a big theme. Discovering his powers, his place in the world, etc.
One common theme is the struggle for acceptance. Since Starscream is typically male in the original, a female Starscream often has to prove herself in a male - dominated world of Transformers. Another theme is power and ambition. Just like the male version, female Starscream is usually depicted as being highly ambitious and vying for power within the Decepticon hierarchy.
Redemption is also a theme that pops up. Some fanfictions like to explore the idea of Starscream changing his ways, seeking forgiveness or a new path, which can be really interesting as it goes against his traditional 'villain' image.
One common theme is the empowerment of the female character. Since Starscream is typically a male character in the original series, making her female in fanfiction often leads to stories that focus on her strength and ability to break through gender barriers within the Transformers society.
Another theme is the potential for transformation. As I mentioned before, Starscream might change due to Arcee's influence. Also, there could be a theme of forbidden love, considering they are on different sides in their original storylines. Their relationship going against the norms of their respective factions can add an interesting layer of drama to the fanfiction.
One common theme is the power dynamic. Starscream is a powerful character in the Transformers universe, and in these fanfictions, exploring how the reader character relates to his power is often a big part. For example, they might be in awe of his strength or try to find ways to balance the power between them.
One frequent theme is friendship. Despite their differences, some fanfictions depict them forming a strong friendship. This friendship could be a source of strength for both of them. Also, the theme of self - discovery is common. As they interact, they might learn more about themselves. Starscream might realize the futility of his power - hungry ways through Knockout, and Knockout might discover a more assertive side of himself in relation to Starscream.
One common theme is his struggle for acceptance. Being a young and small character in a world of powerful Transformers, he often has to fight to be taken seriously.
A common theme is the power of forgiveness. Since they start off as enemies, for them to have a relationship, there has to be some level of forgiveness. Also, the theme of self - discovery is present. Through their relationship, both Ratchet and Starscream may discover new aspects of themselves. Starscream might find a more compassionate side, while Ratchet might find a more adventurous side. These themes add depth to the often complex relationship depicted in the fanfiction.
One common theme is the idea of redemption. Starscream is often seen as a villain, but in fanfiction, he might be on a path to redemption, and Bumblebee can play a role in that. For instance, Bumblebee's positive attitude could influence Starscream to change his ways.