[Crossover] The Demon King Savior

Yuan Shiliuye, daughter of a former Savior and a former Demon Lord, spent the first seven years of her life doing nothing but eating and waiting to die. Then, at seven, she suddenly learned that she would have to take over one of her parents' careers and support the family.

The profession was supposed to pass down through the generations, with excellent benefits. But in this era of a growing population and fierce competition for jobs, even Saviors and Demon Lords had to compete for their positions.

Shiliuye, who hadn't even decided what she wanted to do, suddenly found out she was unemployed.

(Shiliuye: Yay!)

Before she could celebrate escaping a future as a wage slave, her parents' subordinates pulled strings behind the scenes and sent her to another spacetime, claiming it was for an internship and research.

And so Shiliuye was forced to embark on a career internship (crossed out), getting beaten up by society.

A weakling with a combat power of five, Shiliuye had no choice but to cling to a few temporary guardians if she wanted to survive in these danger-filled worlds. And then...

She danced with demons in Heian-kyo, where humans and spirits coexisted; ran wild in war-torn Sicily; threw her weight around in London under the cover of night; lorded it over the peaceful and friendly city of Yokohama; rampaged through the tranquil town of Namimori; and ruled the extraordinary, fantastical Academy for Espers.

After going through countless hardships to return to her original world, Shiliuye thought she was finally free to lie flat for good. Instead, her parents' fiercely loyal subordinates blocked the entrance to her home.

The subordinates: Have you made up your mind?!

Shiliuye clutched her own frail, innocent, helpless self in terror. “Waaah, please leave me alone! Isn't it great to stay home and let someone else support me?!”

Bonus scene:

After returning to the normal timeline, Shiliuye discovered that her guardians (as they called themselves) from different timelines had also appeared.

And they were fighting over her custody... or rather, her right to raise her.

The First King: ...I distinctly remember her papers saying her surname was Weissmann.

The Golden-Haired Crime Lord: No, you've got it wrong. Her surname is Moriarty.

The Founder of a Seafood Company: Wasn't she originally a Vongola?!

The Great Onmyoji: No, she was originally an Abe.

Then the former guardians all turned their eyes toward someone.

Shiliuye: ...

Why do other people have love rivals fighting to be their husband, while my love rivals are fighting to be my dad?

You're looking for Noa Weissmann / Claire Vongola / Cloris Moriarty / Yuan (Abe) Kamizuki. What does any of that have to do with me, Yuan Shiliuye!!!

Planned arcs:

The Genji Arc (Abe no Seimei and Minamoto no Yorimitsu)

The Sicily Arc (the first generation of the Vongola family and their Guardians)

The Britain Arc (the three Moriarty brothers and the Consulting Detective)

The Yokohama Arc (the Bandage-Wasting Device and the Yokohama Songstress)

The Tokyo Arc (the Kings and the yokai)

The Namimori Arc (the Vongola Tenth and his Guardians)

The Original Academy Arc (the strange, everyday life at an academy for people with special abilities)

Notes:

The main story is written in third person.

The heroine isn't human (literally). Because of her parents, her bloodline is mixed and the timelines within her are a mess. Although she starts out seven years old, that's only a conceptual age. By the clock of the real world, she's several centuries old.

The heroine grows stronger over time. She's very weak at first, but becomes powerful later on.

She loves causing trouble early on. She learns some restraint later, but still causes trouble.

A pampered-by-everyone story. The heroine is mischievous, a heartbreaker, and loves causing trouble, but she's still everyone's little darling.

There are both family and romantic storylines, but the romance won't take up much space and mostly comes later.

Don't read if it's not your cup of tea. The author is sensitive, so no flame wars or unsolicited advice, please. Thanks for understanding~

Theme: The everyday life of an unconventional Savior. Even in the midst of darkness, she still turns toward the light.