A white tiger as a familiar in Harry Potter fanfiction could work in various ways. It could be from a different magical realm and somehow end up in the wizarding world. It would bring with it a new set of magical skills and instincts. For example, it might be able to sense dark magic from a greater distance than normal familiars. And when it comes to the Hogwarts environment, it could form an interesting dynamic with the school's mascots, like the Gryffindor lion, creating a contrast between wild and domesticated magic.
A nekomata could fit in as a rare and powerful familiar. It could be from a far - off magical land and brought to Hogwarts by accident or on purpose. For example, it might have been smuggled in by a dark wizard initially but then escapes and finds Harry.
Well, in this fanfiction, the tiger familiar may have special abilities. It could be able to sense danger before Harry does. So it would lead Harry away from places where there are traps or lurking enemies. Also, being a large and intimidating animal, it can act as a deterrent to some of the less brave adversaries that Harry might face, making it easier for him to get through certain areas or tasks.
A Quetzalcoatl as a familiar in the 'Harry Potter' fanfiction universe would bring in a whole new cultural aspect. The creature has strong ties to Mesoamerican mythology. It could interact with the magic of Hogwarts in interesting ways. For example, its connection to the sun in its native mythology might translate into some sort of light - based magic within the 'Harry Potter' context. It could also have a special bond with Harry that goes beyond the normal familiar - wizard relationship, perhaps due to its more ancient and powerful nature.
A sucubus familiar could be a magical being from a far - off and dark corner of the wizarding world. It could be that a powerful and unorthodox wizard has managed to bind it as a familiar. In the Harry Potter universe, it might be seen as a very dangerous and controversial choice. For example, Dumbledore might be extremely cautious about it, while some dark wizards might be envious and try to steal it.
Well, Celebi is a Pokémon. In a Harry Potter fanfiction, it could be introduced as a very rare magical creature from a far - off land. Maybe it has time - traveling abilities like in the Pokémon world, and in the wizarding world, it could be used to correct historical mistakes or prevent dark wizards from rising in the past. For example, Dumbledore might discover Celebi and use its power to gain more knowledge about Voldemort's early days.
Well, it could be that the Night Fury is a result of some dark magic experiment gone wrong in the past in the Harry Potter world. It has now become a wild and free - flying creature that is feared by many wizards. However, Harry, being the brave one, tries to understand it and tame it, much like he did with Buckbeak. He realizes that the Night Fury is not as bad as people think and uses it to fight against Voldemort's forces.
The Blue - Eyes White Dragon could be a part of a prophecy in the fanfiction. Just as Harry was part of a prophecy in the original story, the dragon could also be foretold to play a crucial role. It might be that the dragon's arrival signals a new era in the wizarding world, and Harry has to figure out how to work with it to defeat a new and greater threat than Voldemort.
If a character in Harry Potter fanfiction had a white tiger as a familiar, it could change a lot of things. For starters, it would be a huge advantage in battles. A white tiger is large and fierce, and could intimidate opponents. In terms of magic, it might have some special abilities related to nature magic, since tigers are part of the natural world. Also, the bond between the character and the white tiger would be very deep, and it could be a source of emotional support as well as magical power.
Perhaps the tiger is a result of a magical experiment gone wrong. Some wizard was trying to create a new kind of familiar and ended up with a tiger. And then, through some twist of fate, the tiger becomes Harry's familiar. Another possibility is that the tiger was a spirit animal that was drawn to Harry because of his unique magical aura.
He could use his invisibility cloak for stealth missions with the Avengers.