Heroes Wiki

-Welcome to the Hero/Protagonist wiki! If you can help us with this wiki please sign up and help us! Thanks! -M-NUva


Heroes Wiki

Seven. Seven human souls, and King Asgore will become a god. Six. That's how many we have collected thus far. Understand? Through your seventh and final soul, this world will be transformed. First, however, as is customary for those who make it this far... I shall tell you the tragic tale of our people. It all started, long ago...... No, you know what? SCREW IT! WHY SHOULD I TELL THAT STORY WHEN YOU'RE ABOUT TO DIE!?!
~ Undyne speaks her first lines in the game when she meets Frisk.
What I like about you is that you're PASSIONATE! You're ANALYTICAL!! It doesn't matter what it is! YOU CARE ABOUT IT!!
~ Undyne
Alphys... I want to help you become happy with who you are!
~ Undyne
Deep, deep in my soul. There's a burning feeling I can't describe. A burning feeling that WON'T let me die.
~ Undyne

Undyne is a major character in the 2015 indie-game Undertale, serving as a major character in the Neutral Route (ranging anywhere from a major protagonist, a posthumous character, or a major antagonist) and True Pacifist Route and the secondary antagonist of the Genocide Route. She's also the main antagonist of the Waterfall chapter. Undyne makes her first appearance after Frisk meets with Papyrus. She is the leader of the Royal Guard and a boss encountered in Waterfall. Frisk first encounters her for real during their tour of the Waterfall when she (Undyne) lashes out at them. She is the idol of the Monster Kid. She is also Alphys' Crush.


Undyne is a fish-like humanoid monster, having royal blue scales and a long bright red ponytail. She always shows a pair of protruding teeth along with fins on the side of her head. Undyne also wears an eyepatch over her left eye, meaning that she lost it or just uses it for her own taste. However, she also has yellow sclera but it turns black when she is fatally wounded.

She is shown in her first appearance wearing a tough armor with boots, gloves and a helmet. Later at her house, Undyne wears her usual clothing: a black tank top, blue pants and dull red boots with one yellow stripe at each edge.

In her Undying form, Undyne's pupils turn white, and her sclera turns black. She no longer has an eyepatch, and her newly revealed empty eye socket emits a flashing light in the shape of a spear. Her hair spikes at the ends and her fins become more rigid and pointy. She also appears to have donned a new set of darker colored armour with souls/hearts on her chestplate and on her new white gloves, accompanied by boots with pointed toes.


While Undyne takes her goals seriously when she is focused on killing the protagonist and getting the last soul so Asgore can break the barrier, she can also be friendly, honorable and honest to everyone she meets, especially Papyrus, Alphys and the Royal Guard, all whom she regards as her friends. She is selfless, as shown by her protection of Monster Kid, either jumping off a bridge to save them on a Neutral/True Pacifist Route or shielding them from a murderous Frisk's attack on a Genocide Route.

Undyne is also encouraged and competitive as shown when Papyrus said she's "not up to the challenge" at having Frisk as her friend and realized that having them as her friend would be her "ultimate revenge". Despite that, Undyne always keeps her kind attitude and cares for those who she considers her friends. She is secretly in love with Alphys, the royal scientist of the underground who also shares the same feelings towards Undyne. Undyne also deeply sympathized with Asgore regarding his heartbreak from Toriel's harsh rejection.

Powers and Abilities

  • Spear Telekinesis- During her first battle with Frisk, Undyne can summon light blue energy spears to telekinetically launch them or have them emerge from the ground. She can also create yellow spears that change directions.
    • Arsenal- Undyne can create an unlimited amount of spears.
  • Enhanced Strength- Undyne is capable of withstanding hits, albeit for a long time, as shown in the Genocide Route. She's also capable of lifting up Alphys and throwing her in a garbage can in the True Pacifist Route.
  • Determination- Undyne has the most (if natural) Determination out of all the monsters in the Underground. However, this in turn causes her to melt, implying that Undyne's body cannot handle the amount of Determination she has.
  • Undine Physiology- Undyne is an undine, an elemental being associated with water, but pronounced and spelled wrong.
    • Soul Manipulation- As a monster, Undyne can manipulate the soul of another.
      • Binding- Undyne can bind others' in their tracks, preventing them from moving or escaping, by turning their soul green.




Undertale (Pacifist) - Part -15- Befriending Undyne


Undertale - Pacifist - Undyne fight


Undertale - Undyne The Undying Boss Fight


Undertale (Pacifist) - Part -16- Just Monster Things

See Also


  • A similar character appears in the game Deltarune as a police officer.


           Undertale Logo.jpg /Deltarune Logo.png Heroes

Frisk | Papyrus | Sans | Toriel | Alphys | Undyne | Mettaton | Asgore Dreemurr | Asriel Dreemurr | Monster Kid | Muffet | Six Humans | Napstablook
Kris | Susie | Ralsei | Noelle | Lancer | Rouxls Kaard | Seam