[Western Crossover] It's Not Stupidity, I Just Have No Other Choice

After her adoptive father's death, Rosie returns to the orphanage, where her biological father comes to find her.

Using her mind-reading ability, she learns some shocking secrets:

My dad is Batman!

My brothers and sisters are vigilantes!

My little brother is the heir to an assassin organization!

Faced with a family whose secret identities could stretch all the way around America, Rosie is extremely wary, because she has a mysterious identity of her own.

Rosie is the youngest demon hunter to debut this century.

Her adoptive father took her in when she was ten. Because of her extraordinary mutant abilities, she was trained as an anti-demon weapon to destroy the mythical monsters hiding in the shadows of the world.

Demon hunters are forbidden from getting too close to others, so Rosie decides to protect her secret identity by doing one thing:

I'm going to play the fool in this family.

When she sees the gunshot wounds on Bruce, she says, "Father, be careful when you go skiing!"

When everyone in the family except her turns into little animals, she says, "Wow, is this cosplay? It's so realistic!"

A sweet, innocent airhead who everyone loves. But try too hard, and you can end up looking like a complete idiot.

When Rosie's youngest sibling can take no more and is about to persuade their father to have her intelligence tested ...

Gotham faces its first major incident of the year.

A demon has risen from Hell.

It invades Batman's mind, trapping his reason. As everyone struggles to find a solution, the family's silly, sweet little sister pulls a weapons case from under her bed.

Rosie Wayne loads bullets with mercury and presses the muzzle against the Dark Knight's brow.

She says, "It's time to come back, Father."

Only then does everyone realize that there are two secrets in the family:

One: Rosie has known their secret identities for a long time.

Two: She is the new demon hunter who has been working alongside them every night.

#You deceive me, I deceive you, she deceives her; everyone has their own secrets#

#Forget it, we're family. Let's go home and make some burgers#

There are some original headcanons, and several universes are mashed together.

Inspired by many European folk tales.

The pairing is Jason Todd.

My Jason won't be aged up, and he won't meet the pink-haired girl.

If that's a dealbreaker, please steer clear ...

Very little romance, mostly plot and Batfamily domestic shenanigans.

Theme: A sweet, satisfying story.