For Halo, the Flood is an interesting concept to write about from different perspectives. You can write about the horror of being infected, or the intelligence behind the Flood's actions. In Mass Effect, Liara T'Soni is a great character for fanfiction. Her knowledge of the Protheans and her relationship with Shepard, whether romantic or platonic, can be explored in many ways. Another interesting Halo character is Dr. Halsey. Her morally grey actions in creating the Spartans can be delved into deeply in fanfiction.
In Mass Effect, Thane Krios is an intriguing character. His past as an assassin and his spiritual beliefs, as well as his relationship with Shepard, make for good story - telling. In Halo, the Elites as a whole can be interesting. You can explore their culture, their code of honor, and how they deal with the changing political landscape after the fall of the Covenant. And in Mass Effect, the Reapers, despite being the main villains, can be written about in interesting ways, like exploring their origin and motivation from their own point of view.
Shepard is an obvious choice. With their complex backstory and the many different versions players can create, there's a lot to explore. Garrus is also very interesting. His loyalty to Shepard and his own personal journey from a young turian trying to prove himself to a respected leader make for great material. Liara is another one. Her unique abilities as an asari and her relationship with Shepard, both romantic and as friends, can be delved into in many ways.
Popular characters in Halo Mass Effect Fanfiction include some of the elites from Halo. Their honor - based culture can create interesting interactions with Mass Effect characters. Thane Krios from Mass Effect is also a character that often shows up. His assassin skills and complex backstory can add depth to fanfiction stories. And then there's the Flood - infected characters which, while not traditional 'popular' in the sense of heroes, can create really dark and interesting plotlines in fanfiction.
Master Chief from Halo is also a common character in these crossovers. His super - soldier abilities and stoic personality could make for some interesting interactions with the more diverse cast of Mass Effect. He might be intrigued by the biotics or the different political systems in the Mass Effect galaxy.
Sure, they might be able to understand it. Mass Effect characters have dealt with a wide variety of species, cultures, and technologies. So, they could draw parallels between what they know and the elements in the Halo 4 fanfiction. For instance, the concept of a powerful and ancient enemy in Halo 4 could be related to the Reapers in Mass Effect. However, some details like the specific Halo rings or the Covenant species might take more time to fully comprehend.
Some interesting concepts include character development. Imagine a Spartan from Halo teaming up with a Spectre from Mass Effect. How would their training and personalities clash or complement each other? Additionally, the idea of the Forerunners' technology being studied by Mass Effect's scientists is quite cool. It could potentially change the balance of power in the Mass Effect universe and open up new plotlines for fanfiction writers.
One aspect of Mass Effect Andromeda x Halo fanfiction could be the crossover of characters. Imagine Shepard from Mass Effect meeting Master Chief from Halo. Their leadership styles are different but both are highly respected in their respective universes. In fanfiction, they could team up to face a common threat that combines the enemies from both games, like a new type of alien that uses both the Reaper and Covenant technology. This would create a really exciting and unique story.
In Halo, Master Chief is always an interesting character to write about. His stoic nature and badass combat skills provide a lot of material. In RWBY, Ruby Rose is a popular choice. Her innocence combined with her powerful scythe - wielding skills make for great storylines. When it comes to crossovers, seeing how Master Chief would react to Ruby's enthusiasm and naivete would be fascinating.
In Halo Mass Effect crossover fanfiction, a great concept is the sharing of technology. Maybe the UNSC could get their hands on Mass Effect's element zero and use it to enhance their ships' FTL drives. Also, the idea of characters like Master Chief and Commander Shepard teaming up is exciting. They could learn from each other's combat strategies and leadership skills. This could make for some epic battle scenes against common enemies like the Flood and the Reapers.
One interesting concept could be the combination of the different alien species from both universes. For example, seeing how the Covenant from Halo would interact with the various alien races in Mass Effect like the Turians or the Asari. Another concept might be the technological mash - up, such as how the Spartan armor could be enhanced with Mass Effect tech or vice versa. Also, the idea of the Flood from Halo being a threat in the Mass Effect galaxy and how the different factions would deal with it is quite fascinating.
One interesting concept could be the crossover of technology. For example, how the biotic powers from Mass Effect might interact with the advanced weaponry of Halo. Maybe a character from Mass Effect using a Halo energy sword in a unique way.