Who are some characters that could be added to a 'Behind the Mask' Batman fanfiction?

The Riddler's daughter could be an interesting addition. She could be a brilliant detective herself, but conflicted about her father's criminal ways and her own feelings towards Batman.

A young detective who idolizes Batman from afar and tries to help him in secret. This character could bring a fresh perspective to the story and also add some mystery as Batman tries to figure out who this helpful stranger is.

It could be Sasuke. He might be wearing a mask for some mysterious reason, like hiding his new powers or a new allegiance. Maybe he's on a secret mission that even Naruto doesn't know about at first.

A new detective character who is initially skeptical of Batman but later realizes they need to work together to stop Black Mask. Another could be a young street kid who has a connection to Black Mask's past and ends up being an unexpected ally to Batman. And perhaps a tech - genius ex - employee of Black Mask who wants to redeem himself by helping Batman take down his former boss.

Adding a character like Amanda Waller would be interesting. She could be pulling the strings behind some of Peacemaker's missions, adding a layer of mystery and political intrigue. Or even bringing in a character like Green Arrow for a brief encounter to see how their different ideologies clash.

Perhaps a fanfiction could show Batman's vulnerability behind the mask. He's often seen as this invincible figure, but in reality, he's just a man. The mask could be a symbol of his isolation, and a story could be crafted where he starts to break down those walls he's built around himself while wearing the mask, maybe through an unexpected friendship or encounter.

Hermione Granger from the 'Harry Potter' series could be an interesting addition. She could use her magic knowledge to help the Ghostbusters understand the more esoteric aspects of the ghosts they're dealing with. Maybe she could even develop spells that work in tandem with the Ghostbusters' technology.

I don't know who specifically created this 'Behind the Mask Batman Dead End Story'. It could be an independent comic book writer, a fanfiction author, or even part of a small - scale creative project.

It might also be a completely new character created for the fanfiction. This new character could be wearing a mask for a unique reason, like hiding a special power or being part of a secret organization. The fanfiction could then revolve around this new character's journey and how the mask plays a role in it.

A character like a Pokémon whisperer who can communicate with Pokémon on a deeper level than anyone else. This person could teach Ash new ways to bond with his Pokémon. Another could be a wandering minstrel who travels around the Pokémon world, singing tales of legendary Pokémon and has clues about a powerful Pokémon Ash is seeking.