Percy might be initially confused. He may not understand why his half - brother has such strong negative feelings towards him. He could try to talk to him to resolve the issue, thinking it's just a misunderstanding.
In some cases, Percy might feel sad and a bit betrayed. He may start to distance himself from his half - brother, but still secretly hope that things can get better. He might focus more on his own friends and activities, but every now and then think about what went wrong with his half - brother.
He could also become defensive. If his half - brother starts attacking him verbally or physically, Percy would defend himself. He might use his skills or powers to protect himself while still hoping to find a way to fix the relationship. For instance, he could block his half - brother's attacks and then ask him to calm down and talk.
Harry could also be very hurt. He might start to question what he did wrong and try to talk to Ginny to find out the reason. He might say things like 'Ginny, I don't understand. What have I done?' in an attempt to clear up the situation.
He might be confused at first. Percy has always been a bit of an outsider among the gods, but he may not expect Artemis to hate him. So he would try to figure out what he had done wrong.
He may become angry. Percy has a bit of a temper, so he could lash out at the situation or even at Annabeth if she's still around. He might feel betrayed and start to question all the things they've been through together. He could also go into a state of depression. Losing Annabeth, who has been such an important part of his life, could make him withdraw from his friends and activities. He may lose his motivation for quests and just mope around, feeling sorry for himself.
It could also be due to some family drama in the past. Perhaps there was a misunderstanding or a situation where Percy was favored by one of their parents unknowingly. Say, if Percy's father made a decision that seemed to benefit Percy more, like giving him a special weapon or training opportunity, which made his half - brother resentful.
Sometimes, Percy gets defensive. If he feels that Annabeth is being unfair, he'll start to argue back. He'll try to explain his side of the story and defend his actions or words. In some fanfictions, this can lead to a big argument between them.
Percy could be heartbroken. He might initially go into a state of denial, not believing that Annabeth would actually leave him for a mortal. He might keep thinking there was some mistake or that she was being influenced in some way.
He could go on a desperate search for her. Percy is a very determined person. He would try to find out the reason for her leaving. He might ask all their mutual friends and look for clues everywhere. Meanwhile, he would also be trying his best to take care of their child. He would be heartbroken but also focused on keeping their family together in some way.
Naruto might initially be shocked or confused. For example, if they prank him with the fake ramen, he'd probably make a really funny face when he takes the first bite. But then he'd probably laugh it off because he has a good sense of humor.
Harry could react with anger. He is a strong - willed character. So, he might confront Snape about his hatred. He would demand to know why Snape is treating him this way when they should have a father - son relationship. This could lead to a series of intense arguments between them.
Percy might be initially confused. He's not always the most attuned to flirting, so he could just stare at Drew blankly for a moment.