How can a cat be incorporated into Harry Potter and Black Butler Fanfiction?

Yes, there might be some fanfiction that has such an interesting and rather unique concept. Some fanfic writers like to create crossovers and put unexpected twists in them. They might imagine Harry Potter as a cat within the world of Black Butler for various reasons, like exploring different character dynamics or just for the fun of it.

In Harry Potter fanfiction, a cat could be a magical familiar. For example, it might be a cat that can transform into a wizard's assistant when needed. In Black Butler fanfiction, a cat could be part of the Victorian - era setting, perhaps a stray that Ciel and Sebastian encounter on the streets of London.

Well, the plot could involve the cat - Harry Potter - stumbling into the Black Butler world. Maybe he's lost his human form due to some dark magic. He could then encounter Sebastian and Ciel. The cat - Harry - might use his magic in cat form to help or hinder the duo in their investigations. For example, he could use his invisibility ability (in cat form) to spy on enemies.

The Black Lagoon itself could be a place accessible through some kind of dark magic or ancient wizarding portal. The Creatures there could be either enemies or allies to the wizards. Some could have unique powers that the wizards might want to harness or avoid. This would add a whole new layer of mystery and danger to the Harry Potter universe.

Melania could be a healer who is called to treat a member of the Black family. Through this, she gets involved in their family politics. Maybe she discovers that there is a curse on the family that is causing all their misfortunes and she tries to break it. This would involve her researching old Black family magic and secrets, and she might have to face opposition from some family members who don't want their secrets exposed.

A black dog in Harry Potter fanfiction can be incorporated creatively by making it a part of a character's backstory. Maybe the character was saved by a black dog when they were a child in a magical accident. So, the dog becomes a significant part of their life. Also, it could be a transformed form of a cursed object. Every time someone touches the object, the black dog appears and causes chaos or reveals hidden truths.

You could create a new type of magic that combines the two. Let's say there is a character in the fanfiction who is half - wizard from Harry Potter and half - something related to Black Butler (maybe has a demon ancestor). This character has a unique magic that is a blend of spell - casting and the ability to make deals with supernatural forces. Their spells might have a different effect because of the demonic influence. For instance, a simple levitation spell could also cause a small amount of fear in those around them because of the dark undertones from the Black Butler magic.

Sebastian could sacrifice himself to break a powerful spell that was endangering Ciel. He might know that his death is the only way to save Ciel and decides to do it without hesitation. This shows his loyalty to Ciel, which has grown over time.

One idea could be a crossover where the characters from Harry Potter end up in the world of Black Butler. For example, Harry, Hermione and Ron could be mistaken for some kind of strange magical beings in the Victorian era of Black Butler. They might be brought to the Phantomhive manor and Sebastian has to figure out what to do with them. Maybe they are there to solve a mystery that involves both the magic of the Harry Potter world and the dark secrets in the Black Butler universe.

He could be incorporated as a long - lost relative who was banished from the family due to his dark and strange magic. His return in the fanfiction could stir up old secrets and rivalries within the Black family.