Percy could stand up for himself. If he shows the bullies that he's not afraid, they might stop. For example, if they push him, he could push back (not in a violent way but in a firm 'I won't be pushed around' way).
Well, one scenario could be that Percy is bullied in school. Maybe the bullies pick on him for being different, like if he has some unique abilities or is just not as popular. Another situation could be that he's bullied in a new environment, like a summer camp, where the other kids don't accept him at first. It could also be that the bullies target Percy because of his family background or something that makes him stand out in a way they don't like.
One way could be for Percy to find a group of true friends who can support him. They can stand up to the bullies together. For example, if there are some nice classmates, Percy can join them during breaks and lunches, and the bullies might be less likely to target him when he's in a group.
His older siblings, if he has any in the fanfiction. They could use their age and influence to protect Percy. Older siblings often have a natural instinct to look out for their younger ones. They could walk Percy to and from school, or have a word with the bullies to scare them off.
It could be because Percy is different. If he comes from a different background or has a unique personality trait, the bullies might target him. In the fanfiction, if Percy is from a different race or has an unusual way of speaking, the bullies might pick on him for not being like them.
He might also find some allies. Leo can look for friends or even adults who can support him. If he has a good friend, they can walk together and the bully might be less likely to target him. And if he tells an adult like a teacher or a parent, they can take steps to stop the bullying.
In the fanfiction, Percy could overcome bullying by finding true friends who support him. They can stand up to the bullies together. For example, if there are other kind-hearted characters, they might form a group to protect Percy and show the bullies that their actions are unacceptable.
It could be some of the lesser - known badniks that team up to bully Sonic. Since they can't defeat him on their own, they figure that by ganging up on him and bullying him, they can at least make his life difficult.
Well, it's popular because it taps into real - life issues like bullying. Many readers can relate to Deku's experiences on some level. Also, it creates a sense of drama and tension. We as readers are rooting for Deku to come out on top, and the whole process of seeing him deal with the bullies and grow stronger is very engaging. Moreover, it gives fanfiction writers a chance to put their own spin on the character and his backstory, which is always exciting for the fandom.
Perhaps an older teacher or coach who has always had an eye on Kuroko's potential could step in as a savior. They could see the signs of bullying and use their authority to punish the bullies and provide support and guidance to Kuroko, helping him to grow stronger both on and off the court.