All Three of My Secret Identities Are the Strongest

Nan Yan transmigrates into an immortal-demon game set in a world divided into three realms: the human, immortal, and demon realms.

The good news: she has three accounts.

Her first secret identity is the Demon Venerable's most loyal right-hand man. Her second secret identity is the foremost disciple by the Immortal Venerable's side. Her third secret identity is the former ruler of the demon-beast realm, before its destruction, and is currently undergoing trials in the human world.

That means she has allies everywhere across the three realms.

The bad news: she has to train all three accounts to become the strongest in the world before she can go home.

So...

Nan Yan has the Demon Venerable's most loyal subordinate betray him, steal his demon bone, and become the strongest, before sacrificing herself for the Way. The point is to make way for her second secret identity.

Then she has the Immortal Venerable's foremost disciple backstab him, comprehend the Heartless Way, and become the strongest, before making another graceful escape through death. The point is to pave the way for her third secret identity.

Finally, her third secret identity, Nan Yan, becomes a great Demon Emperor while undergoing tribulations in the mortal realm. After many twists and turns, she successfully ascends, conquers the three realms, and officially becomes the strongest demon ruler in all three realms.

But as she looks at the few lunatics before her, who keep chattering away in her demon palace even after becoming prisoners of war, she falls into deep thought.

*

[Guide] [Warnings]:

The female lead is no paragon of justice. She will stop at nothing to grow stronger and survive.

A feel-good Mary Sue harem story, with male pregnancy and some intense, dark scenes.

Here's a preview of an upcoming story.

Preview:

After Nan Yan transmigrates into a book, the System tells her: [Next, you'll have at least seven secret identities. After living seven different lives, you'll have to fall in love with seven different male leads from this book, one by one, and become each of their cherished first loves. You can go home only after reaching either a happy or bad ending with all seven male leads.]

Nan Yan: ?

"Why can't I use one secret identity to win over all seven at once? That way, I'd only have to do it once."

The System's tone is scornful: [What does it mean to be someone's cherished first love? Innocent, pure, without a flaw. That's what makes someone a cherished first love. How could one ever date seven different men at the same time? That would make her a dark obsession, a heartbreaker, a nightmare.]

Nan Yan: "...All right."

*

As it turns out, what the System never expected was that an innocent, pure, flawless cherished first love could become everyone's nightmare.

*

[Guide] [Warnings]:

The female lead is neither kind nor moral. She's a heartbreaker.

A melodramatic Mary Sue, with a rivalry-filled romance battlefield and a satisfying power fantasy. The focus is on making the men suffer.

A story told in separate arcs, with no looping. The female lead uses a different secret identity in each arc. Her personality varies slightly while playing each identity, but her true nature stays the same.

Theme: Be the best version of yourself