I think Atra is a very interesting character to write about in 'iron blooded orphans fanfic'. Her relationship with Mikazuki is complex and filled with unspoken emotions. Writers can explore how she copes with the dangerous life the boys lead and her own dreams for a peaceful future. Then there's McGillis. His devious plans and his journey from being a part of Gjallarhorn to his own path of change can be really engaging to write about. And don't forget about Gaelio, his rivalry with McGillis and his own sense of honor can be explored in depth.
Mikazuki is definitely one of the most interesting. His quiet yet determined nature gives a lot of room for exploration. Writers can dig into his thoughts and feelings during battles or his loyalty to Orga. Another is Orga, as the leader of Tekkadan. His decisions and the weight of leadership on him can be a great focus. Also, Kudelia is interesting. Her role in the story as a political figure from Mars provides opportunities to write about her growth and influence on the Tekkadan crew.
There might be a fanfiction that delves into the backstories of the antagonists in Iron Blooded Orphans. It could show what led them to oppose Tekkadan and their reasons for their actions. This could add more depth to the conflict in the series and make the antagonists more relatable.
One popular storyline could be about the characters' backstories that were not fully explored in the original. For example, delving deeper into the childhood of Mikazuki. Another might be an alternate universe where the Tekkadan group forms alliances with different factions. And some fanfics might focus on the relationships between the characters, like the friendship between Orga and Biscuit evolving in unexpected ways.
There might be a fanfiction that focuses on the backstories of the side characters in Gundam Iron Blooded Orphans. For example, exploring the past of some of the mechanics in Tekkadan, how they got involved with the group and what their dreams were before joining the cause.
Another idea is a crossover where the magic from Harry Potter is introduced to the world of Iron - Blooded Orphans. For example, the Tekkadan group discovers a hidden magical artifact. This artifact could give them an edge in their fight against the Gjallarhorn. Maybe it could be a magical weapon that only works for those with pure hearts, similar to the concept of the Sword in the Stone in the Arthurian legends which are somewhat related to the magical world of Harry Potter.
A plot twist could be that Voldemort somehow ends up in the Iron - Blooded Orphans' universe. His dark magic could disrupt the balance there. Maybe he teams up with some of the antagonists in that world, but then realizes he can't fully control them because they don't fear his brand of magic. This would lead to a power struggle within the new alliance.
One unique aspect is the blend of different power systems. Naruto has chakra and jutsus, while Gundam Iron Blooded Orphans has advanced mecha technology. In fanfiction, seeing how these two interact can be really fascinating. For example, Naruto might use his chakra to enhance the performance of a Gundam or use his jutsus in a mecha battle.
Sportacus is definitely one. He's so full of energy and always ready to help, which gives a lot of scope for interesting stories. Stephanie is also great. She's brave and curious, and her interactions with the other characters can be really engaging. And Robbie Rotten can be a really fun character to write about. His attempts to cause trouble and how the others foil his plans make for some hilarious scenarios.
Katarina Claes is definitely one of the most interesting. Her original dense - headedness and her journey to avoid her bad endings in different scenarios provide a lot of material for fanfic writers. Then there's Geordo Stuart. His complex feelings for Katarina and his princely status make him a fascinating character to explore in fan - created stories.
Nine Ball is an exciting character for fanfic. Her hacking skills are crucial to the heists, and you can write about how she stays ahead of the security systems. You could also explore her backstory, like how she got into hacking in the first place and what motivates her to use her skills for the crew's heists.
Sunny is a very interesting character to write about. His complex past and his struggle with guilt and mental health issues provide a lot of material. You can explore how he might interact with other characters differently as he continues to heal or regress. Aubrey is also great. Her tough - girl exterior but with a vulnerable side underneath gives room for exploring her character development, especially in relation to her friendships and past experiences.