Snape might be initially shocked. His face could turn pale and his eyes widen in disbelief. But then, a small glimmer of something like pride or warmth might flash across his face for a split second before he quickly composes himself and snaps at Harry to focus on the potion.
Maybe his dad gives a small smile and a nod. He could be a bit reserved in his reactions but still show that he appreciates Adrien's attempt at humor. He might say something like 'That was quite clever, Adrien.'
She might be devastated. Bella could go into a state of shock initially. Then, she might feel a deep sense of loss and loneliness. She could also be filled with anger towards the cause of her father's death.
If you don't want to be too direct, you can start talking about something else to change the topic. For example, start talking about your day at school or a fun activity you did recently. This might make dad understand that you're not interested in the badtime story without having to say it directly.
He should first realize that a gay story is just like any other story about people's lives. He could try to understand the feelings and experiences of the gay characters in the story. Maybe he could even learn something new about love and acceptance. If he has any questions or misunderstandings, he could do some research or talk to people who are more knowledgeable about the gay community.
Sasuke might be initially shocked. He's always been in a sort of competitive relationship with Naruto. But then he might see it as a sign of Naruto's growth and need for family. Sakura would probably be really happy for Naruto. She knows how much Naruto has yearned for a family, and she would see Kakashi as a great father figure for Naruto. As for the older generation like Tsunade, she might be a bit hesitant at first, but then she would support it, seeing that it gives Naruto more stability.
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.
Percy's reaction could be complex. Initially, he'd be hurt and angry. But as time passes, if Annabeth is sincere in her attempts to get him back, he might start to question his own feelings. He could be torn between his love for her and the pain of the betrayal.
In the long run, Percy might grow from the experience. He could become more cautious in his relationships and less trusting. Or, if there's a chance for redemption in the fanfic, he might be open to forgiving Annabeth if she shows true remorse and has a valid reason for her actions. But initially, it would be a very difficult and emotional time for him.
At first, Sans would probably be a bit shocked, but then he'd turn on his laid - back, sarcastic attitude. He might make jokes at Gaster's expense, which could either annoy Gaster or make him respect Sans more. If Gaster tries to harm him, Sans could use his shortcuts to dodge attacks and try to find a way to reverse the situation. He'd also likely be thinking about how this affects his friends in the Underground, especially Papyrus, and try to find a way back to them.