Severus could become more empathetic as a ghost. When he was alive, he was often bitter and closed - off. But in ghost form, seeing the students struggle and the teachers' efforts in the school, he might start to understand the importance of unity and kindness. He could start to feel remorse for not being more open - minded when he was alive. He might also develop a new relationship with his memories. Instead of being haunted by his past, he could learn from it and use it to guide the living in a positive way.
In a 'Young Severus Becomes a Ghost' fanfiction, his character development could be quite complex. He may initially be confused and lost as a ghost, not knowing what his purpose is. But as he explores the school in his new form and observes the students and teachers, he starts to understand the value of forgiveness. He might try to communicate with those he wronged, like Lily in some way. His development could also involve him coming to terms with his own identity. He was always defined by his past, by his love for Lily, by his rivalry with James. As a ghost, he could break free from some of those constraints and become a more well - rounded, self - aware 'person' even in his spectral form.
His character might develop a new sense of perspective. As a ghost, he is detached from the physical world and can view his past actions more objectively. He could realize the full extent of his mistakes and the good he had also done. For example, he might see how his actions towards Harry were sometimes driven by his own past traumas rather than pure malice.
Severus' character undergoes a major transformation. He begins to value relationships more, especially his newfound father - son relationship with Harry. He may start to interact more with the other students in a less intimidating way because he realizes that being harsh all the time isn't good for anyone, especially Harry. He also becomes more involved in the non - potions aspects of Harry's life at Hogwarts, like helping him with his other studies or dealing with bullying from other students. This shows a side of Severus that was previously hidden, a side that cares deeply for someone other than himself.
A possible plot is that as a ghost, Severus discovers secrets about the wizarding world that he couldn't when he was alive. For example, he might find out more about the origins of certain spells or dark magic. He could also be a protector of the school in a different way as a ghost. He could use his knowledge and newfound ghostly abilities to prevent dark forces from infiltrating Hogwarts again. And he could have interactions with other ghosts in Hogwarts, like Nearly Headless Nick, and learn from their experiences as well.
In some fanfictions, Severus Snape's character develops by becoming more open - minded towards Muggles. He might start off with his typical wizarding - world prejudices, but through various interactions, he begins to see Muggles in a new light. For example, he could meet a Muggle scientist whose thirst for knowledge reminds him of his own love for potions, and this changes his view.
In these fanfictions, Severus often develops a more nurturing side. Since he has Harry as a pet, he has to take on a caretaker role, which is different from his usual strict and aloof self. He might become more patient as he guides Harry through various situations.
Severus' character often develops from a cold and aloof figure to a more caring and nurturing one. He starts to open up his heart as he takes on the role of raising Harry. His sense of protectiveness grows, and he becomes more patient, which is a big change from his usual self in the original series.
His character might develop more of a social side. As a bartender, he has to interact with various people, so he could become more approachable. For instance, he might start to crack a rare smile or two when chatting with regular customers.
Severus might start off as just fulfilling a sense of duty. He has always been a complex character. But as he saves Harry from the Dursleys, he begins to see Harry in a new light. He realizes that Harry is not just James Potter's son but an individual with his own struggles. This could lead to him becoming more empathetic towards Harry, gradually shedding some of his cold exterior.
The bullying makes him more withdrawn. He becomes less trusting of others. For example, if he's constantly bullied by the Marauders, he'll be more likely to keep to himself and focus on his studies and his own pursuits in potions and the Dark Arts.
At first, Severus would probably be very suspicious of Harry. After all, Harry is an unknown figure suddenly appearing. But Harry, being the friendly person he is, would try to break the ice. He might start by complimenting Severus on his potion - making skills, which Severus is already quite good at even as a young boy. Their interaction would be a bit tense initially, but as they start to understand each other more, they could become friends or at least allies.
In many OC (Original Character) fanfictions, Young Severus Snape's character development can be quite diverse. Some fanfictions might focus on his difficult childhood and how it shapes his personality. For example, his experiences with his family and the bullying he endures could be explored in more depth. The OC could play a role in either exacerbating or alleviating his hardships, which in turn affects how his character grows.