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Despite this, he becomes obsessed with tacos and chocolate, and was very friendly with Ink until Ink told Cross he couldn't revive the dead. Afterward, he acts arrogantly towards others and is disgusted by everything around him. Cross is also more active than the original Sans and has never been lazy (EVER). He has also become very selfish, destroying peaceful timelines of other alternate universes just to restore his own. After being resurrected by Gaster from his universe, Cross was remorseful when he saw his resurrected friends and brother, who looked at him with disappointment. After they left, he protected Dream Sans when Nightmare Sans and Killer Sans nearly killed him, and traveled with him to the Omega Timeline. This may indicate that he may have regained his original personality.

Cross has one white and one red pupil, as well as a red lightning-shaped scar under his right eye socket, acquired during a fight with Frisk from XTale before the XGaster reboot. His original soul was half an inverted white monster soul and half a red human soul.

He wears predominantly black and white clothing, like the other XTale characters. His outfit consists of a white hooded jacket over a black long-sleeved shirt with several white elements and white fluff on the hood, black shorts with white crosses on each leg, and white shoes with crosses. He wears a gold heart-shaped pendant and a black and white tattered cape, and fights with a HACK knife—a small, fragile knife capable of distorting codes if it doesn't break in the process.

After returning to Underverse 0.4, his red eye and scar disappeared.

He will receive a new design in the new Metadora comic.

At first, Cross was much more compassionate than the original Sans, willing to believe in Frisk even when he tried to kill him. But when Frisk took control of their friends, including Cross's brother, Papyrus, Cross lost all faith in him and used all his power to stop him, killing his former friends, even mercilessly killing Papyrus and absorbing Frisk's soul.

His greed and recklessness manifested itself in the fact that even when Chara told him he couldn't overwrite the world, he still killed Frisk. Upon realizing the truth, he suffered a nervous breakdown and became completely delusional over the loss of his own world, going so far as to take his negative feelings out on Chara.

Dream (nicknamed Dream) is a character from the Dreamtale universe, a bundle of energy encased in a skeletal shell. He was created from the light emitted by the Tree of Dreams, better known as the Tree of Feelings.

Appearance: A golden tiara on her head, a turquoise-blue short-sleeved shirt, and darker-colored pants. On her waist are spheres containing each person's hopes and dreams.

Dream doesn't have the soul of a monster or a human. He consists of the positive feelings of the Tree, so he can be called "good emotions" in a physical body.

Capabilities:

1. Absorbing Happy Emotions. Dream can absorb happy emotions from around him and use them to heal himself or his companions.

2. Increase speed and strength.

3. Travel through alternate universes. Dream can only travel to universes that contain positive emotions.

Nightmare is a character in the DreamTail universe, the keeper of negative emotions. Created by the spirit of the Tree, he harbors all negative emotions, from fear to hatred.

Nightmare is Dream's brother.

Nightmare was created to protect the dark side of the Tree of Feelings. Along with his brother, Dream, they guarded the tree as guardians.

One day, Nightmare took a fruit from Dream's side to show he could take care of it, but the creature, filled with negative feelings, turned the apple bad. Everyone blamed Nightmare, so he ate all the fruit from the tree. That's when Nightmare became the man we know today...

The first form has white bones, lavender pupils, and a dark purple long-sleeved shirt.

In his second form, he's covered in a shell of hatred and has four tentacles extending from his back. His left eye constantly glows blue/turquoise.

Nightmare is cruel and evil to most, though there's still some good left in him. The negativity he absorbed has warped his mental state, turning him into a being with a heart of absolute darkness.

Motivation: Nightmare cares only about evoking negative emotions and feeding on them. Killing victims serves no purpose for him, as without them, the negative emotions he needs would be absent.

Capabilities:

1. Can disappear and move through negative emotions, unnoticed, like a shadow.
2. Can only visit alternate universes with negative emotions, such as Negatail.
3. Uses tentacles to fight and intimidate enemies.
4. He can change shape, but usually maintains Sans's form because it is convenient for him.
5. Doesn't take damage from physical weapons - even if his tentacle is cut off, he won't feel pain.

Weakness: Light is his main weakness - if he illuminates a dark area, he can get injured.

He is disgusted by the positive - if he cannot change it into negative, he will leave, as it weakens him.

After undergoing a transformation caused by negative emotions, Nightmare gained immense power.

Date of birth: December 21. Zz: Sagittarius.

Killer!Sans uses a sharp knife as his primary weapon, similar to a kitchen knife but with slightly different proportions. He has the ability to teleport, which he can use to dodge attacks or quickly escape from combat. Additionally, Killer!Sans can summon sharp-edged bones, which can be used as melee weapons if necessary. He also uses Gaster Blasters, which can fire laser beams like regular blasters but with the added ability to bite. Like other Sanses, he can use telekinesis to hurl opponents.

Nickname: Killer Connections: Nightmare!Sans (Master) Universe: Alternate Timeline of Undertale (Presumably "Something New") Biography: He was once the classic Sans in an endless cycle of genocide, but at some point he remembered the resets and routes his Frisk had taken. Desperate to end the cycle, he met his Chara, who made a deal with him: kill all creatures in the Underground. This gradually made him increasingly bloodthirsty, to the point where he took Chara's soul, making him stronger and more determined than Frisk. Without the ability to save and load the game, Frisk was killed permanently. After Sans's timeline was completely destroyed by him, he went on a killing spree with other timelines before meeting Nightmare!Sans and joining his quest.

Killer!Sans looks significantly different from Classic!Sans. His jacket is slightly grayer than Classic!Sans's. The hoodie is light yellow instead of white. He wears a black turtleneck shirt, and a red target in the shape of a soul glows on the front. His shorts are inverted: instead of the usual black with a white stripe, they are white with a black stripe, and his slippers are replaced by sneakers the same color as his jacket. Killer!Sans' eyes are completely black, with black tears running down to his chin, like the blue threads on Error!Sans's face. However, in Underverse 0.6, his white pupils are occasionally visible. Killer!Sans has a psychotic, self-righteous, and hostile personality. He often kills monsters in his path and typically acts childishly when he "loses." But he's also very protective of his past, which is unknown in Underverse (except to him). He seems to have a penchant for knives...