Another plot idea is a crossover with a post - apocalyptic world. The Queen's Blade warriors are transported to a desolate future where resources are scarce. They would have to use their combat prowess to survive against gangs of raiders and also figure out how to get back to their own world. This would put their skills and survival instincts to the test.
One idea could be a crossover with a fantasy RPG world. The Queen's Blade characters could find themselves in a world full of magic spells and mythical creatures from the RPG. They might have to adapt their fighting styles and skills to survive in this new environment. For example, Leina could form an alliance with the mages in the RPG world to fight against a common enemy that threatens both their lands.
A possible plot is that a spell gone wrong makes Queen's music the only thing that can calm a dangerous magical creature. Hermione, being the clever witch she is, uses her love for Queen to figure out how to tame the creature and in the process, she also uncovers a long - lost magical connection between Queen's music and ancient wizarding magic.
A plot could revolve around a group of heroes who use angel blades to fight against a new, powerful dark force. They have to discover the true potential of the angel blades and how to combine their powers to defeat the enemy. For example, they might find that when all the blades are united, they can open a portal to a dimension where the dark force originated, allowing them to face it on its home ground.
One interesting Queen's Blade fanfic could be about a new character joining the tournament. This new character might have a unique backstory and special abilities that change the dynamics of the battles.
Another option is a crossover with the Pokémon world. The Phantom Thieves could travel to a region in the Pokémon world and discover that someone is using Persona powers to make Pokémon act out of control. They would need to catch Pokémon themselves and use their combined powers of Personas and Pokémon to stop the bad guy. It would be interesting to see how they interact with Pokémon trainers and the whole Pokémon ecosystem.
A cool plot could involve the Persona 5 crew going back in time to the events of Persona 3. They might end up interfering with some of the original events, which could have unforeseen consequences. For example, they could accidentally change the way a key character in Persona 3 awakens their Persona, and then have to figure out how to fix it while also dealing with the Shadows in that era.
One idea could be to cross it with another popular RPG. For example, having the Persona 4 characters enter the world of Final Fantasy. They could interact with the different races and magic systems there. Another could be a crossover with a detective - themed anime. The Investigation Team could team up with the detectives from that anime to solve a mystery that spans both worlds.
Another plot could involve a crossover with the Punisher and the X - Men. Frank Castle might find himself in a situation where he has to work with mutants. He could initially be distrustful but then realize they are fighting for a similar cause against a common enemy that is targeting both humans and mutants. For example, a group of anti - mutant and anti - vigilante fanatics.
One idea could be a crossover with Peter Pan. Tinkerbell could meet characters from another world, like Alice from Wonderland. She might be confused by the strange rules and creatures there, and her magic could interact in unexpected ways with the Wonderland magic.
Another plot could involve a crossover with a post - apocalyptic world. The Boys find themselves in a world where society has collapsed, and they have to team up with the survivors against new threats. This could bring out new sides of the characters as they are forced to adapt to a completely different environment and face challenges they've never faced before.