The antagonists in the original story might see this as an opportunity. If it's a demon antagonist, they might try to influence baby Ciel in a bad way, to turn him into a more malevolent demon. The human antagonists might be more confused. They don't really understand demons, and now Ciel is a baby demon, which is even more of a mystery to them. They might try to use this situation to their advantage in some way, but not really know how to deal with Ciel directly.
Ciel's friends or allies in the human world would have mixed reactions. Some might be horrified at first, seeing their friend turn into a demon, even if he's a baby. But as time goes on, they might start to accept it and still try to be friends with him. They would also be curious about his new demonic abilities and how he's different from before. And Ciel, as a baby demon, would be more reliant on them in some ways, which could change the dynamics of their relationships.
Ciel would likely become more protective. He has always been in a dangerous world, and now with a baby on the way, he'll do whatever it takes to safeguard his family. Lizzy, she might become more nurturing. She was already a strong character, but motherhood could bring out a softer, more patient side of her.
Ciel would likely become more nurturing. He's used to being in a position of power and having to be tough, but with a baby, he'd soften up. Sebastian would have to suppress his more demonic tendencies. He couldn't be as cold - hearted as he usually is. His focus would shift from just serving Ciel to also protecting the new life.
Allison would use her power to create a positive environment for the baby. She could say things like 'I heard the baby is always happy' and use her power to make it so. The characters would also have to learn to work together to take care of the baby. There would be arguments about the best way to raise the baby, like whether it should be trained to use its powers early or just be allowed to grow up like a normal child. But in the end, they would all come together to protect and love the baby because they understand the importance of family, which is a big theme in the Umbrella Academy.
The friends of Natsu and Erza would also interact with the baby. Gray might make little ice sculptures for the baby to play with. Lucy could read stories to the baby. They all would be part of the baby's life, helping Natsu and Erza raise it. And the baby would respond with lots of giggles and smiles to all their efforts.
Bella would be extremely loving and nurturing. She would spend a great deal of time just holding the baby, looking into its eyes, and talking softly to it. Jasper, on the other hand, would be very protective. He would use his ability to sense and manipulate emotions to keep the baby calm and happy.
Jake, Finn's best friend, would probably be a very protective and fun 'uncle' to the baby. He might use his shape - shifting abilities to create interesting playthings or protect the baby from harm.
Obito might be initially hesitant and a bit awkward around Baby Naruto. But as time passes, he could develop a soft spot for the baby. He might play simple games with Naruto like peek - a - boo or make funny faces to make him laugh.
In this fanfiction, Megatron and Optimus's interactions would be complex. The beach environment could act as a neutral ground. The 'baby' would be a catalyst for change in their relationship. Megatron might be initially dismissive of the 'baby', but as Optimus shows its importance, he could become more intrigued. Optimus would be constantly trying to keep the 'baby' safe from Megatron's more aggressive tendencies. However, as they face common enemies or challenges on the beach, like storms or other threats, they would be forced to communicate and cooperate, leading to a shift in their dynamic.
Batman would be very strict and vigilant about baby Robin's safety. He'd constantly be checking on him. Superman, on the other hand, might use his powers to amuse the baby, like flying around with him gently. Wonder Woman could be like an aunt figure, teaching the baby about courage and honor in simple ways.
Well, Naruto's chakra-based powers could potentially be enhanced or disrupted by the Godlike Demon's otherworldly energy. For example, if the demon has the power to manipulate negative emotions, Naruto might struggle to control his Nine - Tails chakra which is also fueled by negative emotions to some extent.