TWINS RUNES

Long ago, there were two races, monsters and humans, who lived in harmony, but... a war broke out between humans and monsters, and the humans ended up being inhaled, while the monsters were sealed away in Mount Ebott.

And after a few years, a human fell into the Underground and was found by Prince Asriel Dreemurr. It was Chara who fell into the Underground. The Dreemurr family adopted the child, but after a tragedy in which both children died, Asgor Dreemurr, the king of monsters, declared war on humans.

Frisk, flowie/Asriel (undertale), Toriel (undertale), Asgore (undertale), Sans (undertale), Papyrus (undertale), Undyne (undertale), Alphys (undertale), Mettaton, Chara.

In this alternate reality... Monsters were able to live in harmony with humans, but... What stands out is that it's different because in this world there is something called the dark world.

Where inanimate things come to life, and not only that, there exists a legend that three heroes—a human, a monster, and a dark prince—must stop the end of the world and prevent an imbalance between light and darkness. The dark world and the world of light have a fragile equilibrium, so there can only be one dark entrance/source from the dark world. But if more than one dark source opens, that balance will be shattered, and the titans will emerge to destroy the world along with their creator... THE ANGEL OF PROPHECY.

Kris, Susie (Deltarune), Asriel (Deltarune), Toriel (Deltarune), Asgore (Deltarune), Alphys (Deltarune), Undyne (Deltarune), Sans (Deltarune), Papyrus (Deltarune) Noelle Holiday (Deltarune) Carol Holiday (Deltarune), Rudolph Holiday (Deltarune), Berdly (Deltarune).

The six human souls belong to the humans who fell into the Underground, and currently the six souls are in the possession of the monster king.

Clover: justice, the yellow soul color.

Abigail: patience, the color of the blue soul.

Riley: bravery, soul color orange.

Laira: integrity, color of the celestial soul.

Sarah: kindness, the color of the green soul.

Camí: perseverance, purple soul color.

Chaos King: behind bars.

Jevil: asleep and transformed into Susie's scythe and special weapon.

Dark Knight: still at large.

The titans: the oldest are still asleep. But one who was a newborn was defeated with difficulty.

The second legend of the Delta Rune in the world of Deltarune states that if a Lightner or Darkner releases the "Angel" of the prophecy, it will grant them a wish. However, this second legend was erased, and the only ones who know about it are Ralsey and one other person...

The legend of the Delta runes in Undertale represents the angel of freedom, but it is represented in two ways thanks to Frisk and Chara.

The Delta Rune in the world of Deltarune represents an ancient prophecy about three heroes who must save the world from a calamity caused by the disruption of the balance between light and darkness. The three triangles symbolize the three heroes of the prophecy, while the winged circle represents an "angel." Legend says that this angel will destroy or banish paradise to restore balance.

The dark worlds are inhabited by Darkness objects and Undead that suddenly come to life upon contact with this dimension, but if they all return to the world of light, they become objects again.

The Dark Knight's identity is... Dess Holiday... Noelle's missing sister in the Dark World. He attempts to free this Angel and grants her a wish because Dess is undead and wants to revive. She died because of something... A Darkner from the Dark World emerged from the bunker where she was and murdered her. Not only that, he took her body into the Dark World, which is why in the Light World they treat her as if she's missing... Because no body of hers has been found, and that's why in the town they consider her missing, even though she's supposedly still alive. But missing nonetheless.

After the three heroes of the legend, along with Frisk, Chara, and Flowie with his body restored and his soul also restored, have closed a dark source of Asgore (Deltarune), the group is currently at peace in the light world, and Kris was going to help Frisk free the monsters of the underground.

Toriel and Asgore from Deltarune already know about Kris's adventures in his dark world, and they recently experienced one themselves in Asgore's flower shop. They know that it was all real and not a dream. Undyne and Papyrus from Undertale also know about the dark world.

And in part, there's a door that connects the two worlds of Deltarune and Undertale. That door is in the Dark World, and Kris and Frisk can no longer save their game, but luckily Flowie-Asriel (from Undertale) has the power to reset and save as well, so if they need to save, Flowie will take care of everything.

Ralsey, Lancer, Queen, Mr. Tenna, Gerson.