I won't play the coward this time!
~ Alphys before attempting to kill Bete Noire

Alphys was an ally of Frisk who appeared in Season 2. She was voiced by KateMarie999.


Alphys was a female yellow-reptilian monster who was nerdy and wore a lab coat with glasses.


Alphys was often depicted as the stereotypical nerdy scientist. She was socially awkward, yet highly intelligent, which is usually known as the stereotypical nerd personality.

She acted in teenage girl mannerisms and was a passionate anime fan. However, she was filled with guilt on the inside after the incident with the Amalgamates.

Due to this, she kept the information on them concealed from everyone and became extremely depressed because of it. Luckily, Camila saw this as an opportunity to develop her character further in her own series. In Do or Die, Alphys overcame her cowardice and boldly sacrificed her life for the sake of protecting others. Her death, although in vain, represents her character as a passionate soul who puts others before herself.

On a side note, Alphys acted rather bashful around her love interest, Undyne, as seen in the game, Undertale.



Alphys made a brief cameo in the episode, appearing after the barrier breaks.

My Sunshine

Alphys makes a couple of cameos in this season two episode. First, she appears in the background cheering on Undyne whilst Frisk mentions Undyne's recent occupational choice, a police officer. Alphys was also seen watching the reunion.

Do or Die

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Alphys about to attack a blob

Alphys appears in Dr. Gaster's lab putting the fallen books back in their places. She told Frisk that Gaster called her when Sans died. While Gaster and Frisk were talking, Alphys found one of the pink blobs that Bete dropped around the city, and attacked it with presumably a manga. Asriel eventually helps her fight back against the creature. Afterward, Papyrus comes into the lab with Undyne and Jessica.

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Around the Core expansion, Frisk, Gaster, and Alphys's plan were to corner Bete in the Nullifier Room. Gaster would kill Bete, and if he fails, Alphys would activate the Nullifier; Believed to be able to kill Bete. Of course, the plan failed as Bete and Kumu are not human nor monster, but a spell.

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Alphys and Bete glaring at each other

Alphys watched Bete and Gaster fight, but before Gaster could finish her, Bete activates her special attack, Rhabdophobia, which completely turns the tide of the battle. After brutally attacking him, Bete stabs Gaster in the back with her spear. However, Alphys jumps into the Nullifying chamber with Jessica, who grabs the unconscious Gaster and uses a teleportation device to escape. Alphys then encases herself in a green shield and activates the Nullifier, unaware Bete would be unaffected.

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Alphys' death

Alphys's shield fell down and Bete used this opportunity to rip out her soul with a spear. Bete reveals in the scene that she is neither human nor monster. Alphys' soul soon gets destroyed by Undyne, who was tricked into killing the love of her life due to hallucinations.

My Promise

Alphys continues to make cameos in the form of memories. An example is when Undyne was first talking to Jessica, grieving about Alphys. Then, after the pink blobs attacked the house, Alphys appears as a memory causing Undyne, who is now frozen in her tracks, unable to save Jessica.

Game Over

Alphys is mentioned by Asgore while he is taking to Mettaton about her fate. She is also mentioned by Mettaton when he is talking to Isa, saying "She's gone". Otherwise, she had made no cameos and was only referenced upon.


  • Bete didn't feed Alphys' soul to Kumu because it hardly would've made a difference on her powers.[1]
  • Camila mentioned that Alphys is gone forever because her soul was destroyed by Undyne.[2]
  • Alphys seems not to have magical powers of her own, or she never uses them, which may explain why she has to use artifacts and gadgets in battle.
  • As ironic as it is, Alphys was getting more of a spotlight in Do or Die, only to die at the end.
  • Before the release of Do or Die, Camila published a GIF of Alphys on her amino account.
  • It is possible for Alphys to be revived with another physical body. But it is very unlikely to happen.
  • Camila stated the reason Alphys died was because the events in Glitchtale are the complete opposite of what happened in the original Undertale.[3]


  1. Bete didn't feed Alphys'soul to Kumu because it hardly would've made a difference on her powers. (Link)
  2. Camila mentioned that Alphys is gone forever. (Link)
  3. Camila stated that the reason why Alphys died is because the events in Glitchtale is the complete opposite of what happened in Undertale (Link)


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