You could also focus on her abilities. Since Hidan is known for his immortality through his jutsu, a female Hidan could have a variation of that. Maybe her immortality is linked to a different source, like a powerful female deity in the Naruto universe. This could lead to many interesting plotlines where she has to deal with the consequences of this power and how others try to either use or destroy her because of it.
One idea could be to explore her backstory. Maybe she was an outcast in her village due to her unique beliefs and fighting style, similar to Hidan in the original. She could be on a journey to find a place where she truly belongs.
Another aspect could be her relationships. For example, how would she interact with the other Akatsuki members? She might have a different dynamic with them compared to male Hidan. She could form an unexpected friendship with one of the members, like Konan, and they could support each other in their respective goals.
A practical answer is Chapter 271, because it turns the idea into a concrete scene. The chapter opens with He had barely finished speaking when he received a withering look from..., adds pressure through Forget about your brother;
The best chapter pointer here is Chapter 217, "No Problem, They're All Red Anyway". It opens with But Director Sun didn't plan to give her any room to think, he directly... and closes on Although her initial performance was mediocre, fortunately, Jiang Li....
A practical answer is Chapter 271, because it turns the idea into a concrete scene. The chapter opens with He had barely finished speaking when he received a withering look from..., adds pressure through Forget about your brother;
A practical answer is Chapter 272, because it turns the idea into a concrete scene. The chapter opens with Lin Manru held the phone for a few seconds, expecting her daughter..., adds pressure through Just as he was about to shower some affectionate attention on his little..., and ends on So, they.
If you want the clearest chapter reference, go to Chapter 223. Early on, So, for the first time, Jiang Yan, who had always styled himself as the...; later, the chapter leans on My good little sister, I'm begging you, help me figure out how to avoid....
The best chapter pointer here is Chapter 221, "No Choice, He Gave Way Too Much". It opens with Many agricultural students found themselves with tears brimming in their... and closes on As a result, the production crew of Shanbian Company was frequently....
If you want the clearest chapter reference, go to Chapter 274. Early on, Upon hearing this, Officer Xu became even more excited, but catching a...; later, the chapter leans on However, inside, she couldn't help the bubbles of excitement bursting....
The best chapter pointer here is Chapter 256, "Bonfire Feast". It opens with Turning around, Jiang Yan and Zhao Lang found their heads had been... and closes on I was dazzled seeing Jiang Li trending today." Next door, Su Yinwan let....
Chapter 236 is the strongest chapter-level answer because it starts from The short-haired youth beside them chimed in, "That's right, senior, we... and follows through on Everyone, try not to get too anxious." The crowd nodded, seemingly....
If you want the clearest chapter reference, go to Chapter 246. Early on, At that moment, not only Su Yinwan but also Shang Shaojing's complexion...; later, the chapter leans on Beside them, Shu Yan wore the shocked expression of someone who had got....