Gaster

*we don’t want to spoil all the fun for you, am i right?*The following Page contains Spoilers. Read at your own risk.

## Gaster

* Phase 3
* Phase 4

## Personal Info

### Relationships

Sans (partner, later vessel)Gaster's Followers (ex-assistants)

## Battle Info

### ACTs

N/A

>
> > He finally has a tighter grip on this world.
> >
> >
>
> — *IN-GAME CHARACTER'S DESCRIPTION*
>
>

**Gaster** is the overarching antagonist of the fan-game Dusttale: Last Genocide.

The royal scientist who preceded Alphys, after falling in one of his creations, he "shattered across time and space", ending up in a dark world. Thanks to Sans, he gains a chance to return in the world.

## Personality

Gaster's Diary shows that he was dedicated to his scientist role, focusing on various experiments, some of which would hopefully free Monsters from their imprisonment Underground. Although, it is hinted that these experiments would put Monsters' lives at risk, thus, when performing one in particular he decided to undergo it himself, showing a degree of selflessness.

After he fell into his experiment, shattering through time and space, Gaster ended up in the Void and his permanence there has changed him for the worst, becoming uncaring towards his fellow Monsters and sadistic, as shown when he used Sans to regain a body and when he toyed with the Human during their final confrontation. Nonetheless, some traces of his scientific personality and rationality remain.

Because of his "non-existent" condition, Gaster is aware of the cycle of Genocides caused by the Human and is aware of their power and as such decides to get rid of them by trapping them in the Void.

## Biography

### Prior to Undertale

During the construction of the CORE, Gaster starts one particular experiment dedicated to discover the potential usage of Souls fragments. In order to start the construction of a prototype, a fragment of a Monster's Soul is necessary and Gaster, unwilling to put other Monster's lives at risk, decides to undergo the process. Part of the CORE energy is manually redirected in order to keep the safety protocol constantly active. During such process, when Gaster enters the CORE's central heating system chamber, everything goes dark for a second, despite the lightning systems working correctly. Gaster wonders what happened.

After the extraction is successfull, Gaster's assistants notice a weird purple substance covering the fragment. After a period of recovering, Gaster manages to create the Artificial Soul Prototype, using the extracted fragment of his own Soul along with that substance, unwittingly. His Diary is then used to document observations on the prototype.

Soon enough, Gaster realizes that the prototype's unknown power is too dangerous. The Soul is subsequently secured.

An undisclosed time later, Gaster ended up shattering through time and space after "falling in his own creation". This event made him end up in the Void, and remained trapped there for an unknown amount of time.

### Prior to DTLG

Gaster meets Sans in his room in Waterfall. In there, he restores the skeleton's memories of the past Genocide routes, while also telling him of his experiment. Sans accepts the offer, unwittingly following Gaster's hidden plan in regaining a body and escaping from the Void.

### Events of DTLG

Gaster comes to Sans' aid during his Battle, in Phase 3, fueling the skeleton with an unknown Magic, while also summoning his Followers during the struggle, which end up dying at the hands of Chara. The Battle concludes and Gaster vanishes.

After Sans absorbs the Artificial Soul, Gaster returns in Phase 4, using Sans' mutated body as his vessel. Gloating of his newfound freedom and power, he battles the Human one final time. Gaster toys with the Human and after is is shown he is invulnerable, he laughs at them before tossing them into the Void.

## In Battle

*For the in-battle description, check Gaster/In Battle.*

## Trivia

* This Gaster shares many similarities with XGaster, these being:
	+ Both their palettes focus on the color purple, including their Souls;
	+ Both have floating hands;
	+ Both were unable to affect the world directly, but used pawns (respectively Sans and Ink!Sans) in order to execute their plans;
	+ Both use unknown types of Magic, capable of influencing entire timelines.