It could be an orphaned wizard child from a family that was killed by Death Eaters. This would give Snape an added sense of responsibility as he might feel guilty for being associated with the Death Eaters in the past.
Family issues are also common. His difficult family situation at home, with a Muggle father and a witch mother, is often explored. Some fanfictions show how this affected his self - esteem and his view of the wizarding world. They might show how he was treated differently at home compared to at Hogwarts.
One common theme is identity. The child often struggles to figure out who they are in relation to Snape and the wizarding world. For example, they might wonder if they should follow in Snape's footsteps or forge their own path.
One common theme is redemption. Fanfictions often show Snape trying to make up for his past actions or prejudices towards Harry by being kinder to him during his childhood. For example, in some stories, Snape protects Harry from other threats in the wizarding world when he's still a child.
Well, perhaps the plot could involve Snape finding an orphaned child in the wizarding world. He might initially be hesitant but then grow attached as he sees the child's potential. The story could also include Snape teaching the child magic, protecting the child from dark forces, and the two of them forming a unique bond that changes Snape's cold exterior over time.
Perhaps the child is a half - blood like Snape. The fanfiction could explore how the child navigates the wizarding world with this mixed heritage. They could attend Hogwarts and struggle with the same sort of insecurities Snape did. However, they also might have a more positive experience than Snape, thanks to the changes in the wizarding world post - Voldemort.
One interesting storyline could be Severus growing up in his rather dreary neighborhood and his early encounters with magic. Maybe he discovers a hidden magical place near his home where he can practice spells in secret before going to Hogwarts. Another could be his relationship with his parents, especially how their difficult relationship affects his view of love and family in his early years.
One common theme is isolation. The unwanted child often feels alone in the wizarding world, just like Snape did in his own way. They might be shunned by others because of their connection to Snape or their own unique situation.
One great child Snape fanfiction is 'The Young Snape's Adventures'. It delves into his childhood at Hogwarts, showing his early interactions with other students and teachers in a very vivid way.
One popular Severus Snape unwanted child fanfiction is 'The Unwanted Heir'. It delves into the life of a child who is related to Snape but feels unwanted in the wizarding world. The story is filled with complex relationships and the struggle of the child to find their place.