The Defenders in Marvel Comics have a changing lineup over time. Some of the notable members are Jessica Jones, and sometimes even characters like Hulk or Valkyrie join the team depending on the storyline.
Claire is part of the original comics for The Defenders. Her character might have some differences in portrayal compared to the show, but the core presence is there.
The main characters are Erina and Soma. Erina is a highly skilled and refined chef with a discerning palate. Soma is a passionate and creative chef who often thinks outside the box. Their different personalities and cooking styles make their relationship in the fanfic very interesting.
You could write a fanfiction about the backstories of the Defenders. For example, delving deeper into Matt Murdock's training before he became Daredevil. This would give readers a better understanding of the characters.
One major element is the city settings. Daredevil in Hell's Kitchen, Luke Cage in Harlem. These places shape their stories. Also, their powers' origins are important. Jessica Jones' powers came from the mind - control experiments, while Iron Fist has his power from a mystical source. And their personal motives like Daredevil's pursuit of justice and Jessica Jones' search for freedom from her past are main elements too.
Adventure is also a prevalent theme. Fanfictions often send Peter and the Defenders on exciting quests, whether it's to save a city from a new threat or to explore a mysterious realm. These adventures test their skills, both individually and as a team, and provide a lot of action - packed scenes for the readers to enjoy.
One popular 'defenders graphic novel' is 'The Defenders: Indefensible'. It features the team in some really exciting adventures. Another could be 'The Defenders: Strange Heroes' which has unique storylines involving the main characters of the Defenders.
I'm not sure as I haven't read the story, but usually in a story titled like this, the main characters could be some kind of heroes or defenders. Maybe they are ordinary people who rise to the occasion to protect something or someone.