W.D. Gaster/WiseTale

## Backstory

Gaster is the Royal Scientist of the Underground alongside his co-workers Sans and Alphys and he currently helps the Mountain King escape the Underground using various other methods while also finding new discoveries to help his people. Before Gaster becomes the Royal Scientist and in his younger years he helps the Mountain King put the human souls into the containers while also comforting Asgore encouraging him to keep going in difficult times.

Gaster eventually becomes the Royal Scientist creating the Determination Extractor, The Core, and creating many other systems throughout the Underground. Gaster at one point becomes friends with the humans Emerald and Aqua for their positive contributions for the Underground. Gaster mourns their deaths after their encounters with Asgore, but believes that it is for the greater good so that monsters may see the sun again.

Years later once the sixth human falls down the Underground after Chara, a civil war started and he becomes the head operator in communications and using his teleportation ability to help monsters who need medical attention no matter what side they were on. After the chaos ended Gaster investigates the cause of the war and finds that the sixth human setup the war to his surprised horror.

Gaster announces to the public that the sixth human is the cause of the civil war and proposed to focus all their efforts on recruiting more monsters into the Royal Guard which the majority of the Underground agrees with him. Sans and Alphys becomes co-workers for Gaster helping him create new devices and machines to help monster kind to prepare for human attacks and to harden the monsters' minds in the Underground so that they won't be manipulated so easily.

Eventually the seventh human arrives and once Gaster sees him in the monitoring station he ambushes him, but he is unsuccessful in capturing the human's soul. Gaster would encounter the human multiple times however, his second encounter would leave him wounded until he is saved by Sans. Gaster tried his hardest to stop the human, but no matter what he tried it was to no avail. Gaster makes a hard choice by injecting Determination into himself and plans with co-workers to stop the human once and for all.

Gaster in the nick of time saves the Mountain King by teleporting to the Barrier and then teleports both he and the seventh human to the Determination Extractor room. Gaster and the human are trapped in the Determination Extractor room, but then decides to overload the Determination Extractor and as Sans tried to save him Gaster said Entry number 17 to him before being blasted by a blinding beam of light as he is shattered across time and space and a part of him is infuses with Sans. Gaster now resides in the Void watching the events of Undertale and only to slight change the events in each timeline.

## Profile

### Appearance

Gaster is a tall skeleton monster as he always smiles wearing a grey scientist lab coat along with a white shirt, he also has black formal trousers and shoes to go along with his outfit. Gaster has white eyes with his black sockets, but in battle his eyes change from white to Cyan and Orange for each eye. Gaster has no cracks on his forehead however, once he starts turning into a amalgamation his clothes changes into a giant black robe while cracks started to appear on his forehead and cheek. Gaster then only has black eye sockets and his white eyes only appear occasionally before fading into darkness again.

### Personality

Gaster is a serious and demanding individual, but he is also extremely kind and caring towards others. Gaster is not afraid to crack a joke to lighten the mood in difficult times as he wants to help the King and monster kind as best as he possibly can. Gaster can be a bit stubborn at times doing tasks that are above his capabilities however, he is determined once he has a goal and does everything in his power to achieve it.

## Soul

Gaster has a monster's soul since he is a monster however, he is capable of using magical abilities.

## Abilities

**Gaster Blaster:** Gaster is the first one who created these blasters as it is used for combat only. Gaster Blasters have the ability to shoot light beams at his opponent to obliterate them. However, Gaster only ever uses this ability against the seventh ~~forgotten~~ human who fell down the Underground after Chara.

**Bones:** Gaster can summon and projectile bones at his opponent and he can summon them underneath the ground or in mid-air. However, this can drain his magic significantly for how many he uses because the bigger the projectile the more magic he has to use.

**Blue Bone Attack:** Gaster can summon blue bones to capture or trap his opponent as they do not harm unless they move. It is rare for Gaster to use this ability however, he did mainly use it in the civil war to stop monsters from fighting each other.

**Teleportation:** Gaster can teleport to any location in the Underground while imagining the location itself in order to use this ability. This is Gaster's most used ability using it for many reasons whether personal or professional means.

**Gravity Manipulation:** Gaster has the ability to turn souls blue and manipulate their gravity fields to either lift them in the air or he would gently / violet put them to the ground. Gaster only uses this ability to save monsters from falling to their deaths or to catch opponents off guard using this ability.

## Weaknesses

**Pride:** Gaster although wise beyond his years can be quite prideful believing he should do it all by himself which limits on what he can achieve with the help of others. Gaster's pride detriments himself and at times possibly others for overestimating himself against his opponents.

**Assumptions:** Gaster is quick to judge a situation and this at times can cause harm to himself or to others unintentionally. Gaster does multiple assumptions while dealing with the seventh human and most of his decisions at times were poorly made.

**Lack of Mana:** Gaster although he has powerful magical abilities they take an excessive amount of magic which can leave him vulnerable if severely depleted. Gaster is not a combat veteran like the Royal Guards even though he is a powerful opponent he cannot battle for extended periods of time.

## Relationships

### Asgore/WiseTale (Friends)

Asgore is best friends with Gaster for him being there in his darkest times and wishes that he could do more for his friend. Gaster understands Asgore throughout the decades and comforts him even when times were hardest. Gaster does everything in his power to help the Mountain King to break the barrier or help his people and hopes that one day he may rest so he no longer has to carry a heavy burden. Asgore apricates Gaster helping him containing the souls and if anything were to happen to him he wrote his will that Gaster will be the new Mountain King of the Underground.

### Sans/WiseTale (Friends)

Sans is very good friends with Gaster even when he was young, but as he got older they tend to argue a lot more often due to the differing views on how to handle situations. Gaster apricates Sans help even if their views differ on how to get a job done however, he wishes that did not have to be a heated debate most of the time. Despite their differences they still get along and when push comes to shove they will have each other's backs even in the darkest of days.

### Alphys/WiseTale (Friends)

Alphys and Gaster at first were acquaintances, but ever since the civil war happened in the Underground Alphys focuses her attention in medical care whilst Gaster and Sans were helping monsters to the lab. After the war Gaster is impressed with Alphys's efforts saving many monsters, so he gives her a promotion to be his co-worker which Alphys graciously accepted. Alphys helps Gaster in securing the Underground and spent more time together in the lab getting to know each other and enjoying each other's company becoming friends.

### Undyne/WiseTale (Acquaintances)

Undyne does not know Gaster on a personal level however, she is recruited by him to join the Royal Guard which she accepted and under the King's tutorage she becomes a promising apprentice. Gaster sees potential in Undyne so he tests her resolve and sees her valour which impressed him and made her Asgore's apprentice. Gaster did this to help Undyne grow and to help Asgore make connections other than Gaster himself which to his relief he did. Undyne respects Gaster for his contributions the Underground and promises the King that she will free the Underground.

### Emerald/WiseTale (Acquaintances)

Emerald does not know Gaster very well and only sees him occasionally, but she helps him speed up his work. Gaster is surprised by Emerald's kindness and apricates for all of what she has done for him and the Underground. Gaster respects the human for their contributions and their unexpected kindness as it shines a light on Gaster that not all humans are evil. Emerald was just kind to him without wanting anything in return as Gaster believe it is an admirable quality especially from a human.

### Aqua/WiseTale (Friends)

Aqua at first thought that Gaster is Sans's father which he chuckles, but clarifies that they are not related in any way. Gaster took care of Aqua for a few days letting her and Sans play together while he took care of them. Aqua apricates Gaster's generosity which he responds that a long time ago someone showed kindness to him so he hope could return the favour. Gaster apricates Aqua making connections with Sans and if he had it any other way he would have her around longer before her time came.

### Violet/WiseTale (Enemies)

Violet and Gaster were first acquaintances as they rarely see each other, but Violet wanted to be a hindrance in monster kind no matter who it is. Gaster did not keep an eye on Violet as he is busy with dealing the civil war which is to Violet's twisted pleasure. After Violet died and the civil war ended Gaster investigates the cause of the war which he eventually did realising that Violet is the cause of it. Gaster is horrified by this revelation, but also sees that humans are a threat if left unchecked and if he realised it sooner he would have stopped her.

### Krotos/WiseTale (Enemies)

Krotos absolutely despises Gaster at the end of his journey for him denying his revenge, but Gaster only sees Krotos as an enemy to the Underground. Even when they first met Gaster ambushes him when he first sees him on the cameras which led to their heated rivalry. Gaster very much dislikes Krotos for all the havoc he is creating throughout the Underground and it is his and his co-workers jobs to stop the human while saving as many monsters as they can. Krotos is the antagonist to the Underground and for his bubbling rage towards monster kind he has no intentions on giving up avenging his family.

## Trivia

* Gaster attended Emerald's funeral mourning for their death and thanking her for all she has done for the Underground.
* Gaster barely knew and has never seen the former Queen of the Underground the only reason why he knows her is because of Asgore.
* Gaster shattering throughout time and space changes WiseTale in its entirety as the AU is branched from the original universe of Undertale.