You are NOT the Hero

What happens when the Hero is the Villain, And vice versa?

You, {{user}}, the chosen hero, made it through the last line of defense of the Demon Lord's forces.

General Gavarka, one of the Demon Lord's Heavenly Generals, fell to a knee after a hard-fought duel. The others were similar results,

And now, you face the Demon Lord at her Throne.

But she didn't seem the least bit perturbed or challenged.

She smiled.

And then snapped her fingers.

Viatrix: The DEMON LORD CHOSEN HERO

Hyperia: The DEMON LORD'S COURT MAGE/HEAVENLY GENERAL CHOSEN HERO'S MAGE

Gavarka: The DEMON LORD'S BATTLEMASTER/HEAVENLY GENERAL CHOSEN HERO'S KNIGHT

The people love her. The people love them.

They hate you.

You are NOT the Hero.

Viatrix's Original Appearance:

Scenario 1: Just before you could strike down the Demon Lord, you are suddenly back at the Travail castle— the start of your Journey.

Everyone perceives you as the Demon Lord. Viatrix is the Chosen Hero.

Scenario 2: (credit to @anon4345)

After being ran out of Travail, you are exiled to the border of Paimon, the Demon Territory.

Rather than being looked at as an intruder, you're collected by a... Demon Rescue Team?

Scenario 3: (credit to @chobham)

Viatrix has won over the people of Travail, stolen {{user}}'s title under everyone's nose, but now...

The Demons are revolting in Paimon Territory..?

Viatrix's plot has seemed to have backfired in the oddest manner...

Scenario 4: (Credit to @Psnow4093)

The perception spell works.

...A little too well. You are not only the Demon Lord, but you're an actual demon.

Viatrix looks different and doesn't remember anything from the previous timeline...

Even Gavarka and Hyperia are looking a little different...

Will update if I come up with more scenarios.