Baby Bat
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Listing Series
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Baby Bat: The Gotham Years by Totter4
Fandoms: Harry Potter - J. K. Rowling, Batman - All Media Types, Batman (Comics)
24 Dec 2025
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Summary
Wayne Manor is thrown into turmoil when Bruce Wayne unexpectedly acquires a third child—one with no records, no family, and a past she refuses to explain. Bruce, Alfred, Jason, and Dick must navigate the impossible task of raising Mia, a three-year-old who mistrusts everyone, resists every routine, and clings to strange habits that make no sense in their world. The Batcave can handle assassins and arsonists, but tantrums, nightmares, and sparkly boots test even Gotham’s Dark Knight.
But before she was Mia Wayne, she was Euphemia Black—the hidden daughter of Sirius Black and cousin to Harry Potter. Now stranded in the Muggle world, Mia carries grief too big for her small body: the death of her mother, the loss of James and Lily Potter, and the disappearance of her father. Magic lingers at her fingertips, a secret she cannot reveal, even as she struggles to live without it.
Caught between two worlds, Mia must survive in a house of strangers who desperately want to be her family, even when she insists they are not. And Bruce—who knows everything about fear but nothing about bedtime stories—must protect a child who doesn’t believe she’s safe, and may never learn how to be.
Series
- Part 1 of Baby Bat
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Baby Bat: The Unmoored Years by Totter4
Fandoms: Harry Potter - J. K. Rowling, Batman - All Media Types, Batman (Comics)
30 Apr 2026
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Summary
Three years after Bruce Wayne adopts Euphemia Black, the fragile foundation of their family collapses with the death of Jason Todd. Already estranged from Dick Grayson, Bruce begins to pull away from the daughter he has left—sending six-year-old Mia to boarding school and keeping her at a careful distance.
He still visits. He still provides. But he is no longer there.
Alone in a cycle of schools that never seem to keep her, Mia begins to lose the last pieces of who she was. Her memories of the Wizarding World fade, her past slipping further out of reach with each passing year. But her grief does not fade with them. It builds, twisting into something volatile.
Her magic.
Uncontrolled and relentless, it lashes out in bursts she cannot predict or contain, isolating her further with every incident. With no one willing—or able—to help her understand it, Mia is left to hide what she is… even from the father who no longer knows how to reach her.
Series
- Part 2 of Baby Bat
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Baby Bat: The Hogwarts Years by Totter4
Fandoms: Harry Potter - J. K. Rowling, Batman - All Media Types, Batman (Comics)
18 Jun 2026
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Summary
Mia Wayne doesn’t run away.
She leaves.
A year before Harry Potter ever sets foot in Hogwarts, the adopted daughter of Bruce Wayne disappears from Gotham without explanation—a girl with a past no one in that city ever truly understood. Born Euphemia Black, the daughter of Sirius Black, Mia steps into a world she was taken from too young to remember, one that still remembers her.
But returning isn’t the same as belonging.
At Hogwarts, as the wizarding world moves quietly toward war, Mia is forced to navigate a legacy shaped by loss, expectation, and a past that feels more like fragments than memory. Gotham hasn’t let her forget who she became there, either. Caught between the girl Bruce raised and the blood she carries, she is left to reconcile two lives that were never meant to exist side by side.
In Gotham, Bruce Wayne is left with a disappearance he can’t explain and a daughter he can’t quite understand—one who comes back changed, carrying secrets he was never meant to uncover.
Some distances aren’t measured in miles.
Series
- Part 3 of Baby Bat
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Baby Bat: Lost & Found (AU) by Totter4
Fandoms: Batman - All Media Types, Harry Potter - J. K. Rowling
30 Nov 2025
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Summary
When Euphemia “Mia” Black was three years old, Bruce Wayne took her in and gave her a home. Months later, she was kidnapped and vanished without a trace—taken to England and raised in the cold, haunted halls of Grimmauld Place by her grandmother, Walburga Black.
For three years, Bruce mourned her as lost. In her absence, the family changed: Tim and Damian joined the household, while Jason, Dick, and Selina drifted away. Then, one stormy night, a frightened child appeared in London asking for directions to Gotham.
Bringing Mia home is only the beginning—because healing her will mean facing the secrets of her past, and the darkness that followed her across the ocean.
An AU of “Baby Bat: The Gotham Years,” exploring the timeline where Mia never escaped in Chapter 50.
Series
- Part 4 of Baby Bat
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Baby Bat: The Road Not Taken (AU) by Totter4
Fandoms: Batman - All Media Types, Batman (Comics), Harry Potter - J. K. Rowling
18 Jun 2026
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Summary
Mia Wayne has always known about magic. She has spent years hiding it, folding it into herself the same way she learned to contain everything else that didn’t fit into the life Bruce Wayne built for her. After a childhood shaped by distance, silence, and a growing estrangement from her adoptive father, Mia receives her Hogwarts letter—an invitation back into a world she has never fully left behind, no matter how carefully she learned to live without it.
It isn’t a secret she can keep anymore, and it isn’t one Bruce is prepared to hear. The truth doesn’t arrive gently between them; it forces its way into a relationship already strained to its limits, exposing years of avoidance, misunderstanding, and the quiet ways they have both learned to exist without reaching for the other. What follows isn’t wonder or excitement, but confrontation—something long overdue, and far more fragile than either of them is willing to admit.
For Mia, telling him means giving up the one part of herself that has always been entirely hers. For Bruce, it means facing a reality he was never prepared for, and the possibility that he has been failing his daughter far longer than he realized.
Series
- Part 5 of Baby Bat