The other characters' reactions could be complex. Starfire, being an alien, might not fully understand what 'going into heat' means in the context of Beast Boy's physiology, but she would sense his distress and do whatever she could to make him feel better. Raven would be conflicted. On one hand, she doesn't like to get too involved in others' problems, but on the other hand, she knows Beast Boy is part of the team. Cyborg would probably try to build some sort of device to monitor Beast Boy's condition. And Robin would be focused on maintaining the team's overall functionality and safety while also trying to support Beast Boy as much as possible.
Raven might be a bit aloof at first, but she would eventually try to use her magic to help him. She has a deep understanding of emotions and powers, so she would see it as her responsibility. Starfire would be overly concerned and would probably try to cook him all kinds of strange but nutritious meals to help him through it. Cyborg would likely try to analyze him with his tech, thinking there's some sort of mechanical or biological malfunction that he can fix.
Robin would take a more leadership role. He would want to make sure that Beast Boy doesn't put the team in danger because of his condition. He might set up some rules for Beast Boy to follow during this time. As for the other characters, they would all have different reactions based on their relationships with Beast Boy. Raven might be secretly empathetic as she also has to deal with her inner demons. Starfire would be her usual bubbly self, trying to cheer Beast Boy up while also being practical. Cyborg would be constantly making jokes to lighten the mood, but also be serious when it comes to finding a solution.
Perhaps in the fanfic, Beast Boy going into heat could lead to him having a stronger connection to his animal instincts. He might start to have dreams or visions related to his animal forms. This could then lead to a story where he has to go on a journey to understand this new part of himself. His friends could be worried about him and try to follow, but he may want to do it alone at first.
In Teen Titans Beast Boy x Raven fanfic, the power dynamics can be really interesting. Beast Boy has the ability to transform into various animals, which is a very physical and adaptable power. Raven, on the other hand, has her dark magic and psychic abilities. In some fanfics, their powers interact in unique ways. Maybe Beast Boy's animal instincts help Raven better understand her own more primal side related to her powers, or Raven's magic can be used to enhance Beast Boy's transformations in some way.
Obviously, Beast Boy is one of the main characters. Since it's about him, he'll be at the center of the story. Other Teen Titans members like Robin, Starfire, Cyborg, and Raven are likely to be main characters as well, as they are usually part of the Teen Titans group and would be involved in Beast Boy's adventures.
A less common but still interesting trope is the 'role - reversal'. In some fanfics, Beast Boy might be the more serious and responsible one for a change, while Raven becomes more carefree. This can lead to a fresh take on their relationship and how they interact with each other. It also allows for exploring different aspects of their personalities that might not be as obvious in the original series.
It adds variety. There are so many different ways to interpret the Teen Titans characters, and this fanfic offers one more unique take. It gives fans who are interested in this particular concept (futa Beast Girl) something new to enjoy.
The Teen Titans would react with a combination of fear and courage. Starfire, being from another planet, might have some knowledge about the invaders which could be useful. But she'd also be worried about her new home, Earth. Cyborg would probably be excited to take on the new technology of the aliens, seeing it as a challenge to improve his own. Raven, on the other hand, would be more cautious and try to sense any dark motives behind the invasion.
The main character is Beast Boy as it's his story. But the other Teen Titans play important roles too. Robin, the leader, might be listening intently and making comments. Starfire, with her alien charm, could be reacting in her unique, excited way. Cyborg would probably add some of his own tech - savvy remarks, and Raven, with her mysterious nature, might be quietly observing or giving some dry, sarcastic responses to Beast Boy's story.
Beast Boy's origin is quite tragic. He was born Garfield Logan. His parents were scientists doing research in Africa. There was an accident involving a rare disease, and his mother died. His father tried to cure him using an experimental serum which gave him the ability to transform into animals, but his father was later killed too. This led to Beast Boy's journey of self - discovery and eventually joining the Teen Titans.
The 'teen titans beast boy graphic novel' probably focuses on Beast Boy's growth as a character. In the graphic novel, we might see him face different challenges that force him to become more responsible and mature. His powers not only help him in combat but also in his personal development. It may include his internal struggles, like dealing with being different from others due to his powers. There could be some humorous moments too, like when his animal forms get him into unexpected and comical situations.
Beast Boy's power to transform into animals could complement Storm's weather - controlling abilities in many ways. For example, if they are in a battle and Storm creates a powerful windstorm, Beast Boy could transform into a bird and ride the winds to gain a strategic advantage. Or if they are in a desert environment, Beast Boy could turn into a camel while Storm creates a rain cloud to bring water.