Well, Sakura Haruno is obviously one of the main characters. The baby, of course, is also a key character. Depending on the plot, other characters like Naruto or Sasuke might also be involved. For example, Naruto could be the one who helps Sakura find the baby in the first place.
The main characters are Sakura Haruno and the baby. But sometimes, characters from Sakura's family or clan might play important roles. Her parents, if they are still alive in the fanfic, could be there to support her in raising the baby. Or members of her clan could have some special connection to the baby, like a prophecy that the baby is related to the future of the clan.
Sakura Haruno is the central figure in a sakura haruno tattoo fanfic. However, there could be other characters like Tsunade. As Sakura's mentor, Tsunade might have some say in the tattoo. Maybe she warns Sakura about the potential consequences of having a tattoo in the shinobi world. Additionally, Rock Lee could be in the fanfic. He might admire Sakura's tattoo as a symbol of her individuality and use it as motivation for his own growth as a ninja.
Obviously, Sakura Haruno herself is the central character. Her friends like Naruto and Sasuke may also be prominently featured as they are important in her life. Additionally, if the fanfic delves deep into the clan, there might be some made - up characters who are Sakura's relatives, like an elder in the clan who imparts wisdom or a cousin who has a unique ability.
The main character is surely Sakura as it is in the title. The baby is another main character as the whole concept of the fanfic seems to revolve around Sakura hiding this baby. There could be antagonists as well, perhaps some people or forces that are looking for the baby, but we don't know who they are specifically just from the title 'sakura hiding baby fanfic'.
In some fanfics, Sakura Haruno could be in a situation where she discovers a baby with special powers. For example, she might have to hide the baby from those who would want to use its powers for evil. She'd use her combat skills and intelligence to keep the baby safe. This kind of story can be really exciting as it shows a different side of Sakura's character, her maternal instincts and her determination to do the right thing.
I don't know for sure, but since it's a fanfiction centered around Sakura Haruno, she is the main focus. However, it may also feature characters who had a major impact on her life. This could include her sensei, like Tsunade, who trained her in medical ninjutsu. There's also a possibility that new characters created specifically for this fanfiction could be main characters as well, but that's just speculation.
In some Sakura Haruno alpha fanfiction, Kakashi could be a significant character. He might act as a mentor to Sakura in her new alpha role. He could guide her in making difficult decisions, like when she has to choose between the safety of the village and the life of a comrade.
Sakura herself would obviously be a main character, just in her baby form. Her best friend could also be a main character. For example, if she has a friend like Tomoyo, Tomoyo would likely be very involved. She would be trying to figure out how to help Sakura and also taking care of her, making sure she has cute clothes even as a baby.
Naruto could also be involved in interactions with evil Sakura. Naruto, being the protagonist, would likely try to understand why she has turned evil and might attempt to bring her back to the good side. Their interactions could be full of tension and emotional moments.
The two main characters are Sakura Haruno and Doctor Lemon. Sakura Haruno could be a well - established medical professional in the story, or maybe she's still learning and growing. Doctor Lemon is an important figure as well. They could be colleagues, rivals, or even partners in some kind of medical adventure or research. Their relationship and how they influence each other will likely be central to the fanfiction.
Another possible antagonist could be a jealous relative. For example, a cousin who believes they should be the heir instead of Sakura. This relative could spread false rumors about her, or try to sabotage her efforts to prove her royalty in more subtle ways, like stealing important documents or artifacts related to her claim to the throne.