Maybe a girl with a similar power. For example, a girl who can communicate with animals telepathically. They would have a deep understanding of each other because of their shared connection to the animal world. They could go on adventures together, using their powers to help animals in trouble. Their relationship would be based on mutual respect for their powers and a shared passion for animals.
A girl who is really into art. She could see Beast Boy's shape - shifting as a form of living art. She would be constantly inspired by his ability to transform into different creatures. She might draw or paint him in his various forms, and through this, they would develop a strong bond. Their relationship would be a mix of creativity and Beast Boy's more action - packed superhero life.
In the fanfiction, perhaps Beast Boy's girlfriend could be a new superhero in town. They meet during a battle against a common enemy. She first sees his brave side when he's in the form of a fierce beast, and she's drawn to him. As they get to know each other more, they start to date. Their relationship could be filled with adventures as they fight crime together and also deal with the normal relationship stuff like jealousy and misunderstandings.
It could be an ancient and powerful wizard. Maybe the wizard sees potential in Beast Boy and decides to grant him new powers to help him in his fight against evil.
Well, Cyborg could also be a main character. He and Beast Boy are good friends, and Cyborg might have to adjust to his friend's new appearance and the changes that come with it. And then there's Robin. As the leader, he would need to deal with how Beast Boy's transformation affects the team dynamics. Maybe he has to figure out new strategies that take into account Beast Boy's new situation.
It could be Slade. Slade might manipulate situations to make Beast Boy look bad in front of his friends. He could spread false rumors or set up situations where Beast Boy fails, which would make Beast Boy angry at being wrongly accused and at the fact that his friends might start to doubt him.
A good 'Beast Boy girlfriend' fanfic should have a well - developed relationship. The chemistry between Beast Boy and his girlfriend should be believable. For example, if they start off as friends and gradually fall in love, it should be shown in a natural way.
In the fanfiction, Beast Boy could have eaten all of Raven's favorite snacks without asking. This simple act of thoughtlessness might set her off. Or he could have interrupted her meditation multiple times, which is very important to her. Also, if he was being too over - confident in a situation where Raven knew they needed a more careful approach, his cockiness could be a reason for her anger.
Well, he might become even more powerful and be able to transform into new and amazing creatures. Maybe he could gain the ability to fly in his animal forms, which would be really cool.
There could be. Fanfiction is a vast world, and fans often come up with unique and sometimes unexpected storylines. Beast Boy and Starfire are both popular characters, so it's not unlikely that someone has written a fanfiction with this plot. But it might be hard to find among the countless other fanfictions.
One great 'Beast Boy girlfriend' fanfic is 'Green Love'. It beautifully explores a relationship where the girl is understanding of Beast Boy's powers and his insecurities. It has a lot of heartwarming moments between them.
Another reaction could be that he tries to hide his feelings by putting on a brave face. He might joke around even more to cover up the fact that he's really hurt. But deep down, his feelings are still damaged and this could lead to some bottled - up emotions that might explode later.