Since I haven't read the novel, I can't say for sure. But it could be the parents of the baby if the revenge is related to something that happened to their child. Maybe there's also an antagonist who caused the situation that led to the need for revenge.
There could be a variety of main characters in the'revenge baby novel'. If it's a more fantastical story, the baby itself might be a main character in an unusual way, like having some sort of preternatural awareness or ability related to the revenge plot. There could also be a wise old character who guides the revenge - seeking process, and of course, the people or entities that the revenge is directed towards, who might have their own motives and backstories that are intertwined with the baby's situation.
In the 'Jaws the Revenge Novel', there could be a family that has some history with the sharks from the previous 'Jaws' stories. Maybe a father who was involved in the earlier shark - hunting expeditions. There might also be a local sheriff or a coast guard officer who is responsible for the safety of the area. And of course, there would be the shark itself, which is almost like a character with its own motives of revenge. There could also be some local fishermen who are the first to notice the strange behavior of the shark and try to warn others.
In this type of novel, the main character is often a person with a past full of pain and injustice. They are the driving force behind the revenge plot. Then, there could be the ones who caused the initial harm, which could be a group or an individual. Additionally, there might be other characters like a mentor - type figure who gives the main character advice on how to carry out the revenge in a more effective way, or a love interest who either supports or complicates the revenge journey.
Obi - Wan Kenobi is also important. He is Anakin's mentor and tries to stop his fall to the dark side.
I don't know for sure, but I would assume the bloodhound is one of the main characters. There might also be a villain or villains that the bloodhound is seeking revenge on.
Typically, there is the mother of the secret baby. She is a central figure as she holds the secret and has to deal with the consequences. There is also often a father figure, who may or may not be aware of the baby at first.
I don't know as I haven't read it, but it's likely the dragon baby is one of the main characters. There might also be a mother or father dragon.
In a 'baby of the family novel', the main characters would probably include the titular baby of the family. Their parents are likely to be important characters as well, as they play a significant role in the upbringing and life of the youngest. Siblings could also be main characters. They could be a source of both support and conflict for the baby of the family. There might also be other characters like family friends or neighbors who interact with the family and influence the story in different ways.
Anakin Skywalker and Obi - Wan Kenobi are main characters. Anakin's fall to the dark side is a major part of the story, and Obi - Wan is his former mentor.
Since I'm not familiar with this particular novel, it's difficult to name the exact main characters. However, in a novel about imperial guards seeking revenge, we can assume that the leader of the imperial guards would be a central figure. There may also be a character who is the cause of their need for revenge, like a traitor among their ranks or an enemy from outside the imperial guard system.
As I haven't read the novel, I can't say for sure. But surely the revenge angels and their mother are main characters. There might also be some antagonists who are the targets of the revenge or those who try to stop the angels from achieving their goal.