Integrity

Integrity
Character Information
Also known as	Blue SOUL human, blue SOUL child

Integrity, also known as the blue SOUL Human, was the fifth human to have their soul captured and the last human that fell before Clover. They serve as an overarching antagonist in Undertale Yellow.

Appearance

Integrity, like all of the fallen humans, was a child. In Undertale, the Ballet Shoes and Old Tutu belonged to them. Their tutu is described as dusty in a phone call with Papyrus.

In Undertale Yellow, they're also stated to resemble Clover. Artwork on a pillar in the Dark Ruins depicts them with a feminine appearance with what appears to be spiky hair.

History

At some point after 201X, and before Undertale Yellow, the first four humans all climbed the mountain, left the Ruins, and died to monsters shortly after. A map in Chujin Ketsukane's office tracks where four of them died; Patience at the very start of Snowdin, Bravery further on in Snowdin, Perseverance in Waterfall, and Kindness in Hotland. There is no specified order on when they fell. After their deaths, their SOULs were collected and brought to Asgore Dreemurr.

Not included on Chujin's map is Integrity, who has a much more fleshed out story. Integrity was the sixth fallen child and the fifth human SOUL collected. Their actions in the Ruins remain unknown, but in Snowdin, they were the culprit of an attack known as the Snowdin Attack. During a trip to Snowdin by Chujin Ketsukane and his daughter, Kanako Ketsukane, Integrity got into a fight with Dalv, who was playing with and watching Kanako at the time. This fight resulted in Integrity fleeing to Waterfall. This is also the reason for Dalv retreating to the Dark Ruins in fear.

According to a videotape found behind Chujin's grave and Axis's dialogue in the Genocide Route, right after this attack, Chujin activated Axis and told him to track Integrity down and apprehend them. Axis chased them through Waterfall, with Integrity running as long as they could while calling out for help. Due to a mistake in Axis's code, Axis ended up killing the human before Chujin could stop him, against either of their wishes. Axis contained the SOUL and hid the evidence. Chujin kept the SOUL for himself, with the Royal Guard not knowing Integrity was dead.

Chujin used Integrity's SOUL in experiments, attempting to absorb the SOUL himself to extract a serum which could turn any monster into a Boss Monster. The SOUL consistently rejected fusion, leading to Chujin discovering his own SOUL was deteriorated. Chujin left his research for his wife, Ceroba Ketsukane, to complete, telling her not to use Integrity's SOUL due to it not being pure.

Ceroba, against Chujin's wishes, continued using the Integrity SOUL in her experiments, extracting pieces of it to attempt to purify the corruption it contains. After insistence from Kanako, and believing she had purified it, she injected some of Integrity's extract into Kanako, which led to her Falling Down.

Years after Integrity's death, their SOUL was returned to Waterfall, where it was discovered and delivered to Asgore. It's unknown when this happened relative to Ceroba's experiments.

The SOUL was later borrowed by Alphys alongside the other SOULs, where she used existing blueprints to extract Determination from them.

Trivia

• Several Fun Value events show a depiction of the Snowdin Attack in the Dark Ruins pillar room when combined. The third pillar shows a picture of Integrity with the pillar broken where their face should be. This may hint that Axis heavily injured their head or face.