Harry might be shocked and full of regret. He had finally come to understand Snape's true nature in the original story. In the fanfiction, if Snape tries to kill himself, Harry could feel that he had not done enough to reach out to Snape or show him some form of forgiveness or acceptance, and he would likely be deeply troubled by it.
Dumbledore, if still alive in the fanfiction, would be saddened. He had always known Snape's importance and sacrifices. His reaction might be a mix of guilt for not having been able to prevent this and a sense of loss for a valuable ally. He might also try to use his influence and wisdom to bring Snape back from the brink, if possible.
His family would likely be in shock at first. The Weasleys are a close - knit family, and even though Percy had his differences with them, they still care deeply for him. They might feel guilty for not reaching out more or for being too harsh on him during their arguments.
One possible reason could be his overwhelming guilt. Snape had a complex past, being involved in the Death Eaters and then switching sides. He might have felt that he could never truly be redeemed, especially with all the lives lost during the wizarding war that he had some part in, whether directly or indirectly. This guilt could have driven him to such a desperate act.
Arthur would likely be shocked and feel guilty. He might think that he has failed Merlin in some way, not realizing the full extent of Merlin's inner turmoil. He would probably become more protective and try to find out what made Merlin feel this way.
Well, some characters' reactions can be really complex. For example, Dumbledore's portrait might show a solemn look, as if he knew this was an inevitable outcome. The students at Hogwarts would be in a state of shock. Those who were in Slytherin house might feel a sense of loss for their head of house, even if they didn't always understand him. And Neville, he might see Snape's death as a tragic end to a misunderstood hero.
Merlin could use his magic to show Harry visions of a better future. By giving him hope, Harry might change his mind. For example, Merlin could show Harry how his actions in the future would lead to great good.
Well, Snape has always had a complex relationship with Harry. When he finds Harry cutting himself in this fanfiction, he might be angry at first, thinking it's a sign of weakness. But then, as he realizes the depth of Harry's pain, he could soften. He might start to see Harry more as a troubled child rather than just James Potter's son. Snape could use his knowledge of potions to create something to heal the physical wounds and also try to offer some form of emotional support, albeit in his own gruff way.
It might handle it by showing the psychological state of Paul very clearly. Through his internal monologues, the readers can understand his pain and desperation. For example, it could describe how he looks at his Pokemon team and feels like he has let them down, which adds to his sense of failure.
Hermione would probably be very confused at first. Snape has always been a rather intimidating and strict teacher, so his sudden change in behavior would be quite a shock. She might initially think it's some sort of trick or test.
In this fanfiction, it could be that Paul is under the influence of some evil force or has been manipulated. This makes him do things that go against his true nature. As a result, he feels so guilty and ashamed that he wants to end his life. His Pokemon might be his only hope. For example, his starter Pokemon could have a special bond with him and use that bond to reach out to his heart and prevent him from going through with the suicide attempt.
Well, Shikamaru would be one of the characters who would take Naruto's sacrifice very hard. He had always respected Naruto's determination. His reaction might be to become more serious about his duties in the village, feeling that he needs to step up in Naruto's absence. Hinata would be heartbroken too. She had deep feelings for Naruto. She might struggle to come to terms with his loss but also find strength in his selfless act. And all of the Konoha 11 would be united in their grief, vowing to protect the village and each other more fiercely in Naruto's memory.