Optimus might be very polite and respectful in his interaction with humans in this fanfiction. He could see the use of bath bombs as a unique human way of relaxation. Ratchet, on the other hand, might be a bit more skeptical at first. He could be like 'What is the point of these fizzy balls in the water?' But as he sees the humans enjoying it, he might start to understand the concept of self - care. They both could learn a lot about human emotions and the importance of taking time for oneself from this experience with the bath bombs.
The fanfiction could start with Optimus and Ratchet being drawn to a place where humans are using bath bombs. The bright colors and strange scents might intrigue them. As they interact with the humans, they discover that the act of using bath bombs is not just about getting clean but also about unwinding. Optimus could see it as a way for humans to recharge their energy, much like how the Autobots need to rest and repair. Ratchet could start to analyze the ingredients of the bath bombs and find similarities to some substances on Cybertron. This could lead to an exchange of ideas between the Autobots and the humans, strengthening their relationship while they all enjoy the unique experience of the bath bombs.
In this fanfiction scenario, the humans could be using bath bombs to create a relaxing environment when Optimus and Ratchet arrive. Optimus would likely approach the situation with an open mind, asking the humans about the purpose and benefits of bath bombs. Ratchet might be more concerned with the potential mess or any unforeseen chemical reactions. However, as they watch the humans enjoy the scented, fizzy water, they might start to appreciate the human concept of creating a soothing and enjoyable bathing experience. This could lead to a deeper understanding between the Autobots and the humans.
Perhaps there's a fanfiction where the humans are using bath bombs in a large bath tub they've set up near the Autobot base. Optimus and Ratchet come across this strange activity. The humans explain that it's a way to unwind. Optimus, being the diplomatic leader, decides to learn more about this human custom. He asks the humans various questions about bath bombs, like what they are made of and why they fizz. Ratchet is more concerned about the practicality but eventually gets drawn into the fun as the humans start sharing stories about how much they love bath bombs.
They could be incorporated by having the humans use bath bombs as a form of celebration. For example, when the Autobots achieve a major victory, the humans decide to have a party and use bath bombs as part of the celebration. Optimus and Ratchet are invited to join. Optimus might see it as a way to bond with the humans further, while Ratchet would be more interested in the scientific aspect of how the bath bombs work.
One idea for this fanfiction could be that a group of humans who are fans of the Transformers create special bath bombs with the images and symbols of Optimus and Ratchet on them. When they use these bath bombs, they accidentally summon the real Optimus and Ratchet. At first, there's chaos as the two Autobots are confused about where they are. But then, they start to bond with the humans over the shared experience of the bath. The humans show them how the bath bombs fizz and release colors and scents, and Optimus and Ratchet in turn share some of their Cybertronian knowledge about similar substances from their home world.
In a fanfiction, Ratchet and Optimus could be sent on a secret mission. They are alone, away from the rest of the Autobots. This gives them a chance to have more personal conversations. They might discuss their hopes for the future of Cybertron, their fears about the Decepticons, and their memories of the old days. The story could show how they support each other not just in battle, but also on an emotional level.
A fanfiction might involve Optimus getting injured in a battle. Ratchet then has to use all his skills to save him. During the recovery process, they have deep conversations about the war, their hopes for the future, and the sacrifices they've made. It could explore their different perspectives as leader and medic.
There could be a fanfiction where Optimus and Ratchet are stranded on an alien planet. They have to work together to survive, find resources, and figure out a way to contact the other Autobots. This would really highlight their survival skills and their ability to cooperate under extreme pressure.
One reason for the popularity of Optimus x Ratchet fanfic is the opportunity to explore their relationship in different scenarios. Maybe in a fanfic, they get stranded on a strange planet and have to rely solely on each other. This kind of situation can bring out new aspects of their bond that we don't see in the original series.
Another idea is for a time - travel fanfiction. Ratchet and Optimus are sent back in time to an important moment in Cybertron's history. They have to be careful not to disrupt the timeline too much while also trying to change certain events to prevent the rise of the Decepticons. This would require them to work together closely, using Ratchet's knowledge of history and Optimus's leadership skills to navigate this dangerous new situation.
One common theme is loyalty. Their loyalty to each other and to the Autobot cause is often explored. It shows how they support each other through tough times.
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.