Ser Harwin Strong is quite an underrated character. In fanfiction, you could explore his relationship with Rhaenyra more deeply. What were his true feelings? Another one is Mysaria. She has a lot of potential for exploration. Her role as a spy and her connection to Daemon could be delved into further. And there's also Laenor Velaryon. His story as a gay man in a society that may not fully accept him could be expanded in fanfiction.
One underrated character is Nettles. In fanfiction, her bond with her dragon could be explored in more detail. What made her so special to be able to bond with a wild dragon? Another is Jacaerys Velaryon. He's often overlooked, but his leadership skills and his relationships with his family members could be developed further. And there's also Baela Targaryen. Her story as a strong - willed Targaryen woman could be told more fully in fanfiction.
Steve Randle is often overlooked. He could be explored more in fanfiction. He's a loyal friend to Sodapop and has his own dreams and fears. Fanfiction could show his life outside of just being a greaser, like his relationship with his family or his plans for the future.
One underrated character is Yelena Belova. In fanfiction, more could be done to explore her relationship with Black Widow before and after they both left the Red Room. There could be stories about their training together, the competitions between them, and how they eventually reconciled. Another character is Madame B. Fanfic could dig deeper into her motives for running the Red Room so harshly and what led her to become such a cold - hearted figure.
In crestfallen Harry Potter fanfiction, some underrated characters that could be explored are Hannah Abbott. She has a connection to Hufflepuff house, and in a situation where things go wrong in the wizarding world, her loyalty and determination could be put to the test. Also, Blaise Zabini. He has an air of mystery around him, and in a crestfallen scenario, his family secrets could come to the surface and cause him distress. And then there's Parvati Patil. She has been more of a side character, but in this type of fanfiction, her experiences with magic and her relationships could be explored more deeply, especially if she is facing a situation that makes her feel crestfallen, like a rift in her friendship with Lavender or a setback in her magical studies.
Agent Madani is also somewhat underrated. Fanfiction could show more of her backstory and how she really feels about working in a world full of crime and violence. She could be given more complex relationships with other characters, not just Frank. For example, her interactions with other law enforcement agents or even some of the criminals she has to deal with.
One underrated character is Bob, the Titan. He has a really interesting backstory and his loyalty to Percy and his friends is quite remarkable. Fanfiction could explore his past in more detail, like his time before he became Bob. Another character is Small Bob, the cat. He may seem like a minor character, but there could be a really fun fanfic written about his adventures in the House of Hades, perhaps with his own little quests. Nico di Angelo is also a bit underrated in this context. There could be fanfiction focusing on his internal struggles while in the House of Hades, like his feelings of isolation and how he copes with the darkness of the place.
Molly is often overlooked but has great potential. In fanfiction, we could explore more of her relationship with her father and how that affects her role as a Starcatcher. We could also see her develop her own unique magical abilities beyond what's shown in the original story.
Huntress could be a great choice. She has her own sense of justice and skills that could add an interesting dynamic to the Knightfall story. Another one is Azrael. He has a complex backstory and his presence during Knightfall could be explored more deeply.
The Riddler could be included more. He's a very interesting character with his puzzles and mind - games. In fanfiction, he could be given more complex plots and challenges for Batman and Robin to solve. Another is Catwoman. She often gets overshadowed by the more flamboyant villains. Fanfiction could explore more of her ambiguous nature and her relationship with Batman in a deeper way. Also, Commissioner Gordon. He could be more involved in the action rather than just being the one Batman reports to. He could have his own investigations parallel to Batman's in fanfiction.
One underrated character is Black Widow. She has a wealth of spy skills and martial arts expertise. In Avengers Battleground fanfiction, she could be the one to gather intelligence on the enemies before the battle, and then use her combat skills to take out key targets during the fight. Another character is Quicksilver. His super - speed could be a game - changer on the Battleground. He could run circles around the enemies, delivering quick blows or stealing important items. And Bucky Barnes, the Winter Soldier, with his enhanced strength and combat training, could have some great storylines. Maybe he has to face off against some of his old enemies from his time as the Winter Soldier on the Battleground.
One underrated pairing could be Sansa Stark and Missandei. Sansa has grown into a shrewd political player, and Missandei is highly educated and close to Daenerys. They could bond over their experiences in the political and courtly arenas, and perhaps even form an alliance that could influence the power dynamics in Westeros.