The characters can be combined through a magical accident. For instance, a spell gone wrong could transport some Storm characters to Hogwarts or vice versa. Then they would have to figure out how to work together. Harry could teach Storm characters about magic, and Storm characters could show Harry and his friends about their powers.
In a fanfiction, they could be combined by a common goal. Say there is a powerful entity that is draining both magic and the energy of the Storm. Characters from both universes would need to pool their resources. The wizards could use spells to protect against the entity's attacks while the Storm characters use their powers to attack it directly. Their combined efforts would make for a thrilling story of cooperation and survival.
You can combine them by having their abilities merge. For example, a Hogwarts student could learn to use Corvo's powers of possession. They could then use this to possess animals or even other students to solve mysteries or get out of tricky situations at school.
A prophecy could be written in the fanfiction that ties their fates together. So, they are forced to interact and rely on each other's skills. Kalona's strength and Harry's knowledge of magic could complement each other in fulfilling the prophecy.
The characters can be combined by creating scenarios where they meet. For example, a magical portal could open between Hogwarts and a Star Wars planet. Then, characters like Harry Potter might be attracted to the unique qualities of characters like Princess Leia or Luke Skywalker, forming part of a harem. Or a Sith Lord could find the magic of the Harry Potter world fascinating and start to court some of the powerful witches or wizards there.
They can be combined by having their skillsets merge. For instance, Harry's ability to use magic like the Patronus charm could be used to protect Bond during a dangerous mission. Bond's expertise in driving fast cars and using high - tech gadgets could assist Harry in escaping from Death Eaters in a Muggle - filled area.
Well, Harry Potter himself is obviously a very common character. He's often at the center of the action, using his skills and courage to face whatever the storm - related challenges are. Hermione Granger is also common, as her vast knowledge of magic is usually crucial in solving problems. And of course, Ron Weasley, Harry's loyal friend, is there to provide support and comic relief.
The settings can also be combined. Picture a scenario where the Forbidden Forest in Hogwarts is used as a training ground by Kakashi for the students. He could set up ninja - like obstacle courses among the magical trees and dangerous creatures. This would bring a whole new dimension to the Hogwarts experience.
Another way is to create a crossover where the worlds of Naruto (where the Mangekyou Sharingan comes from) and Harry Potter collide. In this scenario, the rules of both universes would have to be adjusted. For instance, the magic in Harry Potter could interact with the chakra system of Naruto. A character with the Mangekyou Sharingan could use it to detect hidden magical spells or even use their Sharingan - based abilities in magical duels, adding a new dimension to the battles in the Harry Potter world.
The worlds can be combined by having characters cross over. For instance, Superman could be called to Hogwarts to help deal with a dark wizard who has powers that are beyond the normal magical abilities. His invulnerability would be a great asset in battles against dark magic.
One way is through magical items. For instance, a magical object from the Harry Potter world like the Philosopher's Stone could end up in Tinkerbell's world and she has to protect it from the dark fairies. Or vice versa, a fairy magic item could find its way into Hogwarts and cause a stir.
They can be combined by making the Black Mamba a part of the magical creatures in the 'Harry Potter' universe. For example, it could be a new kind of Animagus form.