A villain from one of the universes can also be very memorable. Maybe this villain is trying to stop the OC from achieving their goals in the multiverse. The villain could have special powers or a devious plan that makes the OC's journey even more difficult and exciting.
There could be a mentor - like character from one of the universes. This character might have unique knowledge about the multiverse and helps the OC understand how to move between different worlds and deal with the various challenges they face.
One interesting plotline could be the OC encountering different versions of themselves in various universes. It might lead to self - discovery and growth as they compare and contrast their lives.
The oc kid themselves is often the most memorable. Their unique personality and the way they adapt to the zombie - filled world stands out. Also, there might be a grizzled old survivor who takes the oc kid under their wing and teaches them survival tricks. That character can be really memorable for their wisdom and tough love.
Ash Ketchum is often a very popular character in pokemon multiverse fanfiction. Since he's the main protagonist in the original series, fans like to put him in different multiverse scenarios. Another popular one is Team Rocket's Jessie and James. Their comical antics can be explored in different universes. And of course, many of the legendary Pokémon are popular characters in fanfiction. They often have important roles and are central to many multiverse storylines.
Well, Weiss is quite popular in RWBY Multiverse Fanfiction. Her growth as a character, from a somewhat spoiled heiress to a strong fighter, is explored in different ways in the multiverse. Ruby is always a top pick too. Her determination and unique abilities like her speed and scythe - wielding skills are fun to play around with in different multiverse settings. And Pyrrha, even though she had a tragic end in the original, is often resurrected or given different fates in fanfiction, which makes her popular as well.
Definitely Naruto and Sasuke. They are the two main characters in the original Naruto series, and in multiverse fanfiction, their different versions are often central to the stories. For example, a story might focus on a Naruto who was raised differently and how that affects his relationship with Sasuke. Hinata is also popular as she has a lot of potential for character development in different multiverse scenarios, especially in relation to Naruto.
One of the most memorable OCs could be a female warrior. She defies the gender norms of the 'Game of Thrones' world and is able to hold her own in battles. Her strength and determination make her stand out.
Well, aside from Goku and Vegeta, Trunks is quite popular. His time - traveling adventures and his role as a protector in some of the alternate universes are often explored. Another popular character is Piccolo. His unique abilities and his relationship with Goku and the other Z - Fighters provide rich material for fanfiction writers. He can be written as a wise mentor or a powerful fighter in different multiverse scenarios.
The Batman Who Laughs is extremely popular. He combines the intelligence and skills of Batman with the insanity of the Joker. His twisted nature and his dark plans make him a fascinating character in fanfiction.
Obviously Naruto himself is very popular as the main character. His new 'god' abilities and his adventures across the multiverse draw a lot of attention.
Miles Morales is quite popular. He brings a fresh perspective to the Spider - Man story with his own unique origin and powers. Peter Parker is of course always a main character as the classic Spider - Man. Gwen Stacy as Spider - Gwen also has a lot of fans in fanfiction. Her different take on the Spider - Man concept, being a female version, makes for interesting stories.