Hear me out, guys! How about a Yuji!fem reader x Batfam?
I had this random thought but hear me out:
The reader is a result of a one nightstand. Yuji! Reader who grew up with her grandpa had no idea who her real parents are but she's already content with her grandfather.
Bruce is clueless that he has a biological daughter in Japan. He was so caught up in his Batman persona and Gotham that he never cared to open those letters.. Letters that a certain woman sent to inform him that he was the father of her daughter. When Bruce did end up opening the letters, he just pushed it as some desperate woman trying to get in with him for some money.. Not even bothering to investigate or whatnot.
After the whole swallowing sukuna's finger, becoming a vessel, getting kidnapped, then being told about her execution, dying and coming back to life.. She was still happy to have known these great people that she calls a family. She was content with life and it was going well so far.. She had people she cares and cared about her too.. (Sukuna won't admit that he has a soft spot for the girl..)
While they were hanging out after a successful mission (Reader, Gojo, Megumi, and Nobara).. They were told of another mission.. A mission where another one of Sukuna's finger was found but it was located in Gotham so they were sent to Gotham to retrieve that finger.
Random things I want to add:
Sukuna is still the same but has a soft spot for her
I feel like it's either Bruce or Tim who'd find out that she is Bruce Wayne's daughter.
Jason, Tim can see curses (I honestly believe that almost all of them can see the curses since they've all been through near death situation or died (Jason))
This doesn't really make sense but let's pretend that it Jin Itadori is a woman who died then got her body possessed by Kenjaku..
Or
Lets ignore reader being a one nightstand but she's still somehow part of the Wayne.. Lets say that Kaori Itadori was a long lost sister of Bruce Wayne.. Then the story goes just like the canon.
