Harry Potter himself is also a common character to be paired with Snape in fanfiction. Given their complex relationship in the original books, fanfiction writers like to explore different scenarios, like Harry getting to understand Snape's motives earlier or Snape having to protect Harry in unexpected ways.
Hermione Granger is quite popular. Since she is intelligent and often stands up to authority, her interactions with Snape can be really engaging in fanfiction. She might challenge Snape on his teaching methods or they could collaborate on some complex magical research.
Luna Lovegood can be an interesting character to pair with Snape. Her dreamy and unique perspective can contrast with Snape's cynical nature. In fanfiction, they might have interactions where Luna's oddball ideas actually help Snape see things in a new light, or Snape might be the one to protect Luna from those who don't understand her.
Lily is also a popular character to be paired with Snape in powerful Snape fanfiction. Given their history in the original story, fanfiction writers often explore what could have been if things had gone differently between them. It can be a very emotional and complex relationship in these fictional scenarios.
Another character might be Draco Malfoy. There could be a story where Snape's daughter and Draco have a complicated relationship. Maybe they start off as rivals, given their different family backgrounds, but as they grow, they come to understand each other better and form an unexpected alliance.
Cthulhu is often paired with Nyarlathotep. Since they are both from the Lovecraftian mythos, their combined presence can create a much darker and more chaotic story. Another character could be Sherlock Holmes. The contrast between Holmes' rational mind and Nyarlathotep's otherworldly chaos makes for an interesting dynamic. Holmes would try to solve the mystery of Nyarlathotep's appearance and actions, while Nyarlathotep would be constantly trying to undermine Holmes' sanity.
Zoro is another popular character. He and Luffy have a strong bond, and in Gear 5 fanfiction, they might fight together in a new and more coordinated way. Zoro could be using his swordsmanship to complement Luffy's wild and unpredictable Gear 5 attacks, creating a powerful combination against their enemies.
Alice Angel is often paired with Baby Bendy. Their interactions can range from her being a sort of mother figure to him, guiding him through the dark and twisted world, to more complex relationships where they might have conflicting goals but still a connection.
Another popular character to be paired with the 'brother of Naruto' is Hinata. The brother could be protective of Hinata's relationship with Naruto or he could develop his own feelings for her, creating a love triangle situation which adds a whole new layer of drama to the fanfiction.
Luigi is often paired with Vampire Waluigi in fanfiction. Since they are counterparts in the original Mario universe, it creates an interesting dynamic in the vampire - themed stories.
One popular character paired with Kazui Kurosaki in fanfiction is Ichigo Kurosaki, his father. Writers often explore their father - son relationship in different ways, like Kazui learning new skills from Ichigo.
Sometimes, the Black Joker is paired with other anti - heroes in fanfiction. These pairings can lead to interesting dynamics as they might team up against a common greater evil or have power struggles among themselves.
Another popular character paired with her could be some of the other young vampires. They might interact with her, share their experiences of being different, and form a sort of vampire youth group in the fanfiction. They could go on adventures together, learn from each other's powers, and face challenges as a team.