At the beginning, they might be cautious around each other. Optimus Prime, being a more traditional Transformer, might find Optimus Primal's more organic and beast - like nature a bit strange. However, as they communicate, they would find common ground in their goals of protecting their people and planets. They could exchange stories about their battles and leadership experiences. For instance, Primal could tell Prime about how he led his Maximals in the Beast Wars, and Prime could share his tales of fighting the Decepticons. This exchange would help them build a bond and understand each other better.
One possible plot could be that they team up to fight a common enemy. Maybe a new, powerful Decepticon or Predacon that neither could defeat alone. Their combined strength and different abilities would make for an exciting battle.
They could learn a great deal from each other. Harry could teach Optimus about the different kinds of magic, like the Patronus charm which is used to fight off Dementors. Optimus, on the other hand, could show Harry the value of technology and teamwork within the Autobot ranks. Their combined forces could be a great asset in a fight. If they were facing a common enemy, say a new dark wizard who has also allied with the Decepticons, they could use both magic and advanced weaponry to take them down.
Optimus Prime could fit in as a powerful ally. He would be like a super - powered being in the RWBY world. His presence could shake up the power balance. Maybe he arrives through a portal and immediately starts helping the RWBY teams fight the Grimm. He could be seen as a symbol of hope, much like the Huntsmen and Huntresses are in RWBY.
The other characters in the Highschool DxD world would have a wide range of reactions. The angels might see Optimus as an unknown factor and be a bit suspicious. The fallen angels might try to manipulate the situation to their advantage. And the normal human students would be terrified at first. But as the story unfolds and they see Optimus Prime's noble actions, they could start to look up to him as a hero, much like how the Autobots are seen as heroes in their own universe.
A love story for Optimus Prime could involve a love at first sight with an intelligent and brave female Autobot. They would start to communicate more during battles and strategy meetings. Their love would grow as they rely on each other for support.
Baby Optimus Prime's character can be developed by exploring his relationships. If he has a mentor figure among the Autobots, his interactions with that character can shape him. He might look up to this mentor and try to imitate their good qualities. His relationship with other baby Transformers or younglings can also be important. He could learn about sharing, cooperation, and friendship through these relationships. Additionally, his discovery of his own strength, both physical and mental, can be a key part of his development. For instance, when he first realizes he can lift a small object that others thought was too heavy for him, it gives him confidence.
One possible fanfiction could be about Sentinel Prime and Optimus Prime having to work together to save Cybertron from a new, powerful enemy. They might start off with some differences in their approaches but gradually learn to combine their strengths.
Bumblebee and Optimus Prime fanfiction also attracts fans because it can bring a sense of community. Fans can share their stories, discuss different interpretations, and collaborate on ideas. It's not just about the individual stories, but also about the collective love for these characters. Reading and writing fanfiction can create a bond among Transformers fans all over the world.
One great fanfiction could be about Optimus and Arcee going on a dangerous mission together. They face numerous challenges, like battling a powerful new Decepticon. Their teamwork and trust in each other are put to the test. Arcee's speed and agility combined with Optimus' strength make them a formidable duo. Along the way, they might have some deep conversations about the future of their race and their place in the war.
Fanfiction about Baby Optimus Prime might also explore his emotional side. As a baby, he would be more vulnerable and have a wider range of emotions. He could get scared during battles, but also be extremely curious about the world around him. Writers could delve into how the other Autobots help him deal with these emotions, like Ratchet being like a father figure, comforting him when he's afraid and guiding him as he grows.