[Demon Slayer + Jujutsu Kaisen] The Xiehua Siblings' Unreasonable Guardian

[Main fandom: Demon Slayer! Secondary fandom: Jujutsu Kaisen!]

You're an unorthodox wandering Taoist who tried hard to cultivate the Way, but got kicked out of the Taoist order because of your terrible temper. After successfully passing your third tribulation, the Jade Emperor once again rejects your bid for immortality in the Hall of the Divine Heavens. His reason: you lack a benevolent heart, so your name cannot be carved onto the List of the Gods. So you smash up the Hall of the Divine Heavens.

But that doesn't help. You still can't become an immortal, so the Star Lord Taibai gives you an idea: go through some trials in small worlds and cultivate a benevolent heart.

You have no choice but to agree.

Trigger warning!!!

Trigger warning!!!

Trigger warning!!! You must read this!!!

No romance.

This idea came from the tragic backstory of a poor brother and sister.

They truly never meet a single decent person in their entire lives as humans. QAQ

The heroine is a wandering Taoist with a terrible temper and a very strange personality. Because she lacks "benevolence," she was expelled from her sect and became a rogue Taoist. Without a master to rein her in, she does whatever she wants.

Combat power: the ceiling. [High defense, high offense, immortal, with no physical weaknesses]

Since she has never successfully ascended, her temper is even worse. She occasionally swears to vent her anger, and she doesn't have much of a moral compass. She'll happily scam, cheat, and swindle people. She's not exactly a likable character.

After passing the Star Fate Compass, she goes to a small world to temper her heart. Her first stop is the Demon Slayer world.

She meets a miserable brother and sister and initially doesn't plan to get involved. Then she suddenly remembers that Heaven said she wasn't compassionate enough and couldn't become a god. So, though she isn't happy about it, she lends them a hand. (See? I saved people. How is that not compassion?) She also uses the two of them to get used to life in another world. The siblings, especially Gyutaro, are forced to do odd jobs for the unscrupulous Taoist while still very young, act as her translators, and learn Chinese characters (because the heroine refuses to learn Japanese). They suffer under her oppression. (What?)

Does meeting an unscrupulous Taoist like this count as meeting a good person?

(This is not meant to malign Taoists! Absolutely not! I made her a rogue Taoist, which should make it clear that this isn't how I picture Taoists at all. It's simply part of the character setup. Besides, there's a Celestial Palace, so this is obviously a parallel-universe China. This is absolutely not meant to malign Taoists!)

Theme: How hard can raising kids be? Just make sure they don't die