A fanfiction could have Starscream arriving in the RWBY universe. Maybe he could be mistaken for some kind of new Grimm at first. His mechanical nature would be a huge contrast to the organic and magic - based world of RWBY. He might try to take over or find a way to use the Dust in RWBY for his own purposes, seeing it as a valuable resource similar to Energon in his own world.
Well, in some fanfictions, Starscream from Transformers Armada might find himself in the RWBY world. He could be intrigued by the Dust, which is a unique power source in RWBY. He might try to steal it or use it to upgrade himself. The RWBY characters, on the other hand, would see him as a strange and powerful new enemy. They would have to figure out his weaknesses, which are different from the Grimm they usually face. And the Armada's presence could mean a whole new level of threat to the RWBY world, as they are used to dealing with smaller - scale threats compared to the massive forces in Transformers.
I'm not sure if there is a specific fanfiction directly combining Transformers, Starscream, and RWBY. However, you could try searching on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Maybe there are some creative writers out there who have mashed up these different universes in an interesting way.
Starscream could be a villain in the RWBY fanfic universe. His ambition and cunning nature would make him a great antagonist. He could try to take over the various kingdoms in Remnant, using his advanced technology and combat skills.
One possible fanfiction could be about Starscream trying to form an alliance with the Combaticons. Starscream, being his ambitious self, might see the power of the Combaticons as a means to gain more control in the Decepticon ranks. He could approach them with a plan to overthrow Megatron, but the Combaticons would be hesitant at first. After all, they have their own loyalty issues. In this story, Starscream would have to use his wits to convince them that his plan is worth following.
In a fanfiction, Starscream might be in a situation where he has to protect a sparkling from other Decepticons who see it as a threat or a nuisance. Starscream, known for his self - serving nature, could struggle between his usual motives and this newfound sense of responsibility towards the sparkling. This internal conflict could lead to a lot of character development for him.
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.
There's a fanfiction called 'Starscream's Ascent'. In this story, Starscream discovers a hidden power within himself. The author does a wonderful job of portraying his complex personality as he tries to use this new power to gain respect among the Decepticons. It's full of action and his scheming, which is typical of 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.
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.