There's a fanfic called 'Harry's Snape - like Transformation' which is really cool. In this story, Harry starts to take on Snape's appearance gradually due to a dark magic spell gone wrong. The author does a great job of exploring how Harry copes with this new look and the reactions of the other characters.
A lesser - known but great fanfic is 'When Harry Resembles Snape'. It focuses on a mystery where Harry's new look like Snape is tied to an ancient prophecy. As he tries to figure out the prophecy and why he looks like Snape, he uncovers secrets about his family and Hogwarts' past.
One interesting fanfiction could be 'The Unlikely Resemblance' where Harry discovers he has some strange magical connection that makes him look like Snape at certain times. It delves into how this affects his relationships with his friends and enemies at Hogwarts.
One interesting fanfiction could be 'A Resemblance of Souls'. In it, Harry's resemblance to Lily is not just physical but also has a deep connection to some hidden magic in the Potter family. It's a really engaging read as it delves into how this resemblance affects Harry's relationships with other characters like Snape, who had a complex relationship with Lily.
One popular one is 'Snape's Hidden Admiration'. In this fanfic, it delves into the complex emotions Snape has for Harry. It shows how Snape's past experiences with Harry's mother play a role in his admiration for Harry. The story has some really touching moments as it explores Snape's internal struggle between his loyalty to the dark side (initially) and his growing respect for Harry.
One popular one is 'The Girl Who Lived'. It really delves into how a female Harry would interact with Snape in a father - like role. The story shows her growing up under his tutelage, learning magic in a different way compared to the original Harry. Snape's character is also well - developed, showing his complex feelings towards this female version of Harry.
I really like 'Under Snape's Wing'. It starts with Harry being in a really bad state from the abuse he has endured. Snape, with his own set of issues, takes Harry in. The story follows their journey as they learn to co - exist, with Snape slowly becoming a protector figure for Harry. It's full of heart - warming moments as well as some tense ones as they navigate their new relationship.
One great fanfiction could be 'The Unlikely Bond'. In it, Snape and Harry find themselves in a situation where they start joking around during a potion - making class gone wrong. It shows a different side of their relationship.
One great fanfiction in this vein is 'The Silent Bond'. It explores how Snape's relationship with a deaf Harry evolves in the Hogwarts setting. Harry's deafness adds a new layer of complexity to their interactions, and Snape's character is really well - portrayed as he tries to understand and communicate with Harry in a different way.
I recall a story titled 'Snape's Watchful Eye on Hermione'. It shows Snape noticing Hermione's potential early on. He starts leaving little hints and protective spells around her. The story also delves into Snape's complex feelings, as he sees a bit of himself in Hermione's thirst for knowledge and her outsider status among some of the Gryffindors.
One interesting fanfiction could be 'The Unlikely Bonds'. In this story, it explores how their relationships develop in a way that defies the typical animosity shown in the original series. It shows Harry, Snape, Lucius and Draco coming together due to a common threat to the wizarding world. They start to understand each other's motives and gradually form a sort of alliance, which eventually turns into an unexpected friendship.
One great Snape - as - Harry - Potter - mentor fanfiction is 'The Unseen Mentor'. In this fic, Snape secretly guides Harry in the background, using his vast knowledge of magic to help Harry without revealing his true intentions. It's a really interesting take on their relationship.
There are fanfictions that explore the idea of a parallel universe where Snape and Lily got together. In this universe, Harry and Hermione could have different roles. Maybe Harry grows up in a more stable family environment with Snape as a father - like figure, and Hermione is there to study this unique family dynamic and how it affects the wizarding world.