The Space Marines are often popular. Their super - human abilities and cool armor make them great for crossovers. They can be paired with characters from other universes and show off their combat prowess. Another popular character is Abaddon the Despoiler. His menacing presence and leadership in the Chaos forces can create some intense crossover storylines.
In Warhammer 40k crossover fanfiction, Eldar characters like Yvraine are quite popular. Her beauty and mysterious powers are appealing. When she's crossed over with characters from different settings, it can lead to some really interesting interactions. Also, Guilliman is a popular choice. As a key figure in the Imperium, he can represent the might and order of Warhammer 40k in crossovers with other universes.
One of the most popular characters to feature in crossovers is Magnus the Red. His psychic powers are extremely powerful and his complex backstory makes him a great character to incorporate into crossovers. Whether it's a crossover with a universe that also has powerful psykers or a more mundane one, Magnus can bring a lot of drama and action to the story.
In Halo Warhammer 40k crossover fanfiction, the Librarians from Warhammer 40k are quite popular. Their psychic powers can lead to some really cool interactions with Halo's technology and characters. They can sense things in the Warp, and how would that work when dealing with the more scientific Halo universe? Cortana from Halo is also a favorite. Her artificial intelligence is something that doesn't really exist in the same way in Warhammer 40k. So seeing her interact with the various tech - priests or even daemon - possessed entities could be really interesting. Additionally, Chaos Space Marines are often used for their menacing and unpredictable nature in crossovers.
The Space Marines from Warhammer 40k are often popular. Their super - human strength and combat skills would make for an interesting match against the various alien species in Mass Effect. Commander Shepard from Mass Effect is also a common choice. His/her leadership and combat abilities could be a great addition to the often dark and gritty Warhammer 40k universe.
Ruby Rose is often a popular crossover character. Her combat skills and leadership in RWBY make her a natural fit to be inserted into the Warhammer 40K universe. She could potentially lead a squad of Space Marines or be a key figure in a resistance against some of the darker forces. Another popular one is Yang Xiao Long. Her strength and brawler - like combat style can be really interesting when pitted against the various foes in 40K.
Archaon is often a popular choice. His dark and powerful presence can add a lot of drama to a crossover story. He could be pitted against heroes from other factions in unexpected scenarios.
The Silent King Szarekh is also very popular. He represents the ancient and mysterious nature of the Necrons. Fanfiction might delve into his past, his reasons for leading the Necrons, and his long - term plans for the galaxy.
The Space Marines are often very popular. Their noble and fearless nature makes them appealing protagonists. They are highly trained warriors with advanced technology at their disposal, and in the fanfiction, they can be portrayed in various ways, from following strict codes to breaking them for the greater good.
Probably the Space Marines are quite popular. Their strong and noble image makes them interesting candidates for reincarnation stories. They could be reincarnated with enhanced abilities or a new purpose. Another popular character might be the Emperor of Mankind. Fans often like to explore the idea of his possible reincarnation and how it would change the entire Warhammer 40k universe.
Some of the Warhammer 40k characters might also be popular in these crossovers. For instance, the Ultramarines are well - known and could be paired up with Naruto characters. Their sense of honor and combat prowess can create interesting interactions. The way they would view Naruto's powers and vice - versa can lead to some really engaging storylines.
Sigmar is a great choice. His heroic and god - like status in Warhammer Fantasy could make for interesting interactions in a crossover. Another is Malekith. His dark and complex nature would add depth to crossovers, especially with darker - themed universes. Then there's Teclis, the high elf mage. His powerful magic could be a key element when crossing over with other magic - heavy worlds.
Magnus the Red is also an interesting choice. Given his connection to the warp and his fall from grace, there are many stories that can be told. Maybe a fanfiction where he tries to redeem himself in some way, or a story that delves deeper into his relationship with his father, the Emperor, before his downfall.