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.
The Autobots would likely be very surprised at first. Bumblebee might be confused but also very protective. He'd probably try to keep Optimus safe from any potential threats. Ratchet, as the medic, would be both concerned and intrigued. He'd want to make sure Optimus is healthy during the pregnancy.
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.
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 ponies' reactions would vary greatly. Rarity might be fascinated by Optimus Prime's design and might even try to make some sort of fashionable accessory inspired by him. Applejack would be more practical and would wonder what he was doing in Equestria and if he had any good intentions. Optimus would see the ponies as a new and interesting species. He would be patient with their initial wariness of him and would try to show them that he means no harm. He might also be a bit taken aback by their colorful and somewhat chaotic world compared to the more structured world of the Autobots.
Once upon a time, Optimus Prime was resting after a long day of protecting the universe. He parked himself in a quiet corner of the Autobot base. His optics dimmed as he thought about all the battles he had won and the friends he had made. The other Autobots moved quietly around him, knowing he needed his rest. And as he drifted off to sleep, his dreams were filled with visions of a peaceful future for all.
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 plot idea could be Optimus Prime losing his memory and having to rediscover who he is while the Autobots try to protect him from the Decepticons. Another could be a story where Optimus Prime has to team up with an unlikely ally, like a human who has a special power that can help in the fight against the Decepticons. Or perhaps a plot where Optimus Prime travels to a different dimension and has to find his way back while facing new enemies.
In time travel fanfics, Optimus Prime often becomes more introspective. For instance, when he meets his past self or witnesses historical events, he reflects on his past decisions. This makes him more cautious in some cases, as he realizes the far - reaching consequences of his actions.
Once upon a time, Optimus Prime led the Autobots on a mission to a distant planet. The planet was filled with strange energy sources that could either be a great power boost or a deadly trap. Optimus, with his unwavering courage, decided to explore it first. As he ventured into the unknown, he faced many challenges and strange creatures. But he never wavered, for he knew the safety of his team and the future of their cause depended on his actions.