Snape could change from being a rather solitary and bitter person to someone who is more open. Caring for deaged Harry forces him to interact more closely with the boy. He might find himself laughing at Harry's childish antics, which is something he never expected. This new - found connection could make him less guarded and more willing to show his softer side.
Snape's character may become more empathetic. At first, he might be his usual cold self, but as he takes care of Harry, he starts to understand Harry's situation better and shows more kindness.
It's popular because it creates an interesting dynamic. Snape has always had a complex relationship with Harry in the original series. When Harry is deaged, it gives Snape a chance to start anew and perhaps be a different kind of influence. It also allows for exploring Snape's more nurturing side which is a contrast to his usual cold persona.
There's 'Snape and the Deaged Savior'. In this fanfiction, Snape discovers deaged Harry in an unexpected place. He takes on the role of caretaker with his usual grumpy exterior but deep down shows a lot of care. He teaches Harry magic in a different way than the normal Hogwarts curriculum, which makes for an interesting read.
Well, at first Harry might be very suspicious. But as Snape shows consistent care, Harry could start to see him in a new light. Maybe he realizes that Snape has more layers than he thought. He might begin to understand that Snape's past actions were more complex than just being mean to him.
Well, in such a fanfiction, it could greatly change the storyline. Snape is often portrayed as a complex and somewhat bitter character in the original story. But if he takes care of baby Harry, he might develop a different kind of bond with him. Maybe he'd become more protective and less resentful towards Harry as he watches him grow. This could lead to a completely different dynamic between Snape and the other characters too, like Dumbledore. He might not be as secretive from Dumbledore about his feelings for Harry.
In the fanfiction, Harry's relationship with Snape himself would of course be very different. When Snape grows up, he might have a different view of Harry. Since Harry took care of him as a baby, there could be an underlying sense of gratitude, although Snape might not show it openly. And Harry, having seen Snape as a vulnerable baby, might have more empathy for him in their later interactions, which could change the whole dynamic of their relationship compared to what we see in the original books.
Snape's deaged personality could also be more impulsive. Without the restraint of his adult self, he might act on his emotions more quickly. For example, if he felt wronged, he might lash out immediately instead of plotting a long - term revenge like his older self would do. Also, he could be more curious about the world around him, eager to explore magic in a new way that his older self had forgotten due to years of being jaded.
There could be a situation where Harry is being bullied by some students from other houses. Snape, despite his usual cold exterior, steps in and scolds the bullies. For Draco, if he gets into trouble with other Slytherins over some internal house politics, Snape would quietly resolve the issue. In addition, Snape might offer to tutor them personally. He would give Harry extra help with his Patronus charm, knowing its importance, and for Draco, he could teach him some advanced potions techniques that are not taught in regular classes.
Well, Snape's care can make Draco more confident. Knowing he has someone like Snape looking out for him gives him a sense of security. This can lead to Draco being less arrogant and more self - aware. He might start to question some of the pure - blood supremacist ideas he was raised with, as Snape's care could show him that there are more important things than just blood status.
It changes their relationship drastically. Initially, they were at odds. But with Snape taking Harry in, they start to see each other in a new light. Harry might see Snape's more vulnerable side and Snape might see Harry as more than just James Potter's son.
One possible plot could be that Harry discovers a time - traveling accident has brought baby Snape to his present. Harry, being the kind - hearted person he is, takes it upon himself to care for the baby. He has to figure out how to feed the baby, keep him clean and comfortable. Maybe he also has to protect baby Snape from any threats in the wizarding world that might target Snape even as a baby.