Undyne

Undyne (known as StrongFish91 on the UnderNet), is a fish-like monster that leads the Royal Guard. Clad in her full suit of armor, she pursues the protagonist through the entirety of Waterfall and is frequently evaded or inadvertently thwarted by Monster Kid.

Undyne
Lesbian BattleOverworld
Origin
Origin	Undertale
Creator	Toby Fox
First Appearance	Undertale
Actor	N/A
Characteristics
Species	Monster
Gender	Female
Pronouns	She/Her
Sexuality	Homosexual
Age	Unknown (Was a child when Asgore was an adult but Asgore has not aged for a long time)
Birthday	Unknown
Height	Unknown
Weight	Unknown
Ethnicity	Fish
Status	Alive / Deceased (Alive in True Pacifist and some Neutral Routes; Deceased in some Neutral Routes and the Genocide Route)
Alignment	Neutral Good
Archetype	The Lancer, Leader
Occupation	Leader of the Royal Guards
Time Period	201x
Language	English, Monster
Combat Style	Weapons Combatant, Magical Combat
Homeworld	Earth
Relationships
Affiliations	Underground
Enemies	Humans (Formerly in True Pacifist Route)

Appearance

General Description: Undyne is an anthropomorphic fish monster. She has blue scales, a long red ponytail, red and blue fins on the sides of her head, and a pair of sharp, yellow, protruding teeth. She wears red eyeshadow and has an eyepatch over her left eye. Her eyes have black vertical pupils and yellow sclera. She has no nose.

Normal Outfit: A black tank top and blue jeans. Armor varying in light and dark shades of gray.

Alphys Date Outfit: A white turtleneck under a black leather jacket. A scarf around her neck. Pants. Lipstick. A light-colored eyepatch. Some of her hair is let down.

Undying Form: When she persists through Determination after her HP reduces to zero, her 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 like a trident and her fin rays become more rigid and pointy. She wears a new set of darker colored armor with souls or hearts on her chestplate and new white gloves with spikes protruding from their backside, accompanied by boots with pointed toes.

Alternate Forms: Her Undying form is considered an alternate form.

Personality

• Passionate: Undyne is passionate about everything she does. She acts quickly on her ideas and is steadfast in her beliefs.

• Fair and Honorable: Though she wants to defeat the protagonist, she tries to be fair and offers an explanation of how Green Mode works. Asgore taught her the value of pacifism, which is why she sees the protagonist as "a wimpy loser with a big heart." If the protagonist shows mercy, Undyne quickly defends them from Asgore.

• Loves Helping Others: Undyne loves to help others and mentors Shyren and Papyrus in various skills.

• Interests: Undyne dislikes puzzles, loves japes, enjoys playing the piano, collecting weaponry (primarily swords), and anime. She shares her love of anime with Alphys and regards human history as exciting and cool because Alphys told her anime is human history.

• Tomboyish: Undyne appears to be a tomboy.

• Determined: Out of all encountered monsters, Undyne possesses the most Determination. She melts before her death, implying her body cannot handle the amount of Determination she has.

Relationships

Alphys

Undyne and Alphys share a deep romantic love for one another. Undyne first met Alphys in the Garbage Dump while searching for swords, and she listened to Alphys's theories for hours about where the abyss led. The two quickly became close friends, with Alphys introducing her to anime at some point—though she told Undyne they were historical biopics about humans. They spend considerable time together, and Alphys uses the seagrass throughout Waterfall to prepare a special frozen treat for Undyne. The two also collaborated on creating some of Waterfall's puzzles.

At some point, Undyne fell in love with Alphys, drawn to her confidence in her interests and her work, though she struggled to express her feelings. She once called Alphys just to ask about the weather—despite the Underground having none—and frequently wrote letters confessing her emotions, only to lose her nerve upon delivery and start over.

Undyne quit her position as head of the Royal Guard in the Family Ending to become Alphys's lab assistant, where she reportedly caused numerous explosions.

In the True Pacifist Route, Undyne asks the protagonist to deliver a letter to Alphys, though she quickly changes her mind after changing into casual clothes. She later discovers the protagonist and Alphys in the dump, where Alphys—believing the letter was from the protagonist—is having a pretend date and confesses her love. This leads to a conversation where Alphys reveals everything to Undyne, who mostly accepts it. However, upon learning that anime is not real, Undyne becomes distraught. She asks the protagonist to confirm this, and if they do, she is devastated—though she resolves to put on a brave face for Alphys's sake. If the protagonist claims anime is real, she becomes elated and rambles about "gigantic swords" and "magical princesses." Undyne and Alphys nearly kiss after the Asgore fight is interrupted, but Toriel stops them and tells them not to do so in front of the protagonist. During the credits, Undyne is seen kissing Alphys on the cheek, laughing as Alphys faints.

Papyrus

Undyne regards Papyrus as a close friend. She admires his persistence but worries about his well-being, secretly hoping he never joins the Royal Guard because she believes he is too kind to ever hurt anyone. To steer him away from joining, she teaches him how to cook instead. Undyne sometimes enjoys teasing Papyrus, though she often forgets that he tends to take things literally. She becomes heartbroken and enraged if the protagonist kills Papyrus during a Neutral or Genocide Route.

The Human

Undyne initially harbors a strong disdain for the protagonist, believing they would be more useful dead than alive. If the protagonist spares her and offers her water in Hotland, she begrudgingly befriends them—provided they have earned no EXP. Although Papyrus tricks Undyne into befriending the protagonist, she genuinely comes to care for them by the end of their hangout. However, if the protagonist betrays her by killing monsters after their hangout, she ends up hating them even more than she would have without the friendship.

If the protagonist earned no EXP and befriended Undyne in a previous playthrough, she vaguely remembers them as a friend but brushes off the feeling before their battle.

Asgore

Though Asgore is her boss, Undyne views him as a friend and knows his preferred type of tea. When she was younger, Undyne challenged Asgore to a fight but could not land a single blow on him. She felt humiliated because he refused to fight back, only dodging her attacks. Asgore then offered to train her and eventually promoted her to captain of the Royal Guard.

After Toriel refuses to "be friends again" with Asgore in the True Pacifist Route, Undyne expresses sympathy for him.

Toriel

Undyne first meets Toriel at the end of the Pacifist route. The two treat each other warmly and immediately find common ground. In Neutral route endings involving Toriel, their relationship can be positive or negative. If the protagonist killed monsters, Undyne rejects Toriel's new policy on humans and overthrows her, sending her back to the Ruins. If no monsters were killed, Undyne supports her policy and works at Toriel's new school, stating that she backs her.

Napstablook

Napstablook and Undyne live in the same neighborhood, and Napstablook is intimidated by her. Despite this, Undyne tries to be a good neighbor and expresses concern about them being alone after their cousin left, urging the protagonist to be kind to them.

Mettaton

Undyne does not know that Mettaton is Napstablook's cousin. She holds a general distaste for him and does not enjoy his show. Nevertheless, she acknowledges that she "admires his lifestyle.

Shyren

Undyne used to give piano lessons to Shyren, but Shyren stopped coming one day—presumably after her sister fell down.

Monster Kid

Undyne appears to care deeply for Monster Kid's safety. This is evident when she rescues them after they fall off a cliff. The concern becomes even more pronounced in the Genocide Route, where Undyne takes a fatal blow meant for Monster Kid, protecting them at the cost of her own life.

General Information

Name: Undyne

Origin: Undertale/Deltarune

First Appearance: Undertale

Latest Appearance: Deltarune Chapter 3

Company: N/A

Creator: Toby Fox

Actor: N/A

Gender: Female

Sexuality: Homosexual (Undyne and Alphys are a couple)

Pronouns: She/Her

Handedness: Ambidextrous

Age: Unknown (Was a child when Asgore was an adult but Asgore's stated to have not aged for a long time)

Birthday: Unknown

Time Period: 201X

Timeline: Undertale & Deltarune Timeline

Homeworld: Earth

Residence

• • Undertale: Waterfall (Underground)
  • Deltarune: Hometown

Story Role: The Hero

Legacy: Global Legacy (Undyne is the heroine of all monsters)

Influence: Event Influence

Language: English & Monster

Ethnicity: Fish

Religion: N/A

Classification: Heroine

Species: Monster

State of Being: Regular

Physiology: Monster Physiology

In-Universe Creator: Unknown

Occupation: Leader of the Royal Guards

Combat Style: Weapons Combatant (Specifically spears and swords)/Magical Combat

Affiliations: Underground

Enemies: Humans (Formerly in True Pacifist Route)

Height: Unknown

Weight: Unknown

Status: Alive in True Pacifist Route and some Neutral Routes, Deceased in some Neutral Routes and Genocide Route (Is killed by The Human in some of the neutral routes and the genocide route)

Alignment: Neutral Good (Leader of the Royal Guards and hero to all monsters, she will attempt to fight like the heroes of the various media Alphys has shown her, making a fight a fair one, with her going as far as to give The Human a shield to block her attacks)

Protection Level: Global Protector (Hero of all monsters within the underground, and if the human is on their genocide route she recognizes that they're not only a threat to monsters but to humanity too)

Potential

• Type(s) of Potential: Fixed Potential
• Level of Potential: Fixed
• Description: Possesses immense amount of determination allowing her to refuse dying for a bit.
• Limitations: Undyne's body cannot handle the determination she has.

Archetype: The Lancer/Leader

Codex Statistics

Key: Regular | Undyne the Undying

Key Information

• Regular: This key covers Undyne's regular self during her Pacifist and Neutral fights and scenes.
• Undyne the Undying: This key covers her Undyne the Undying self. A form unique to the genocide route.

Grade: A

Tier

RegularUndyne the Undying

9-B, Higher with Magic

At least 9-B, Higher with Magic

Cardinality: Finite

Dimensionality: 3-D

Attack Potency

RegularUndyne the Undying

Wall level (Potency) (Can suplex a huge boulder just because she can. Got a hit off on Asgore Dreemurr), Higher with Magic (Monsters enact in SOUL battles against humans due to humans in their physical forms being far stronger than monsters). Can ignore conventional durability with attacks to the SOUL (As they are attacking the SOUL; which is the very culmination of one's being)

At least Wall level (Potency) (Felt a burning feeling deep within her soul transforming her into Undyne the Undying), Higher with Magic. Can ignore conventional durability with attacks to the SOUL

Durability

RegularUndyne the Undying

Wall level, Lower if not wanting to FIGHT or cruel intentions (Monsters weaken when they don't want to fight and one with more killing intent and crueller intentions will inflict more damage on them)

At least Wall level, Lower if not wanting to FIGHT or cruel intentions

Striking Strength

RegularUndyne the Undying

Wall Class (Potency)

At least Wall Class (Potency)

Lifting Strength

RegularUndyne the Undying

Superhuman Class (Can suplex a huge boulder just because she can)

At least Superhuman Class

Travel Speed

RegularUndyne the Undying

At least Superhuman Speed (Moves far too fast for The Human to run away from her. Made it to Snowdin from her house in a very short timeframe)

At least Superhuman Speed

Attack Speed: Transonic | Transonic Attack Speed

RegularUndyne the Undying

Transonic

Transonic

Reaction Speed

RegularUndyne the Undying

Transonic (Comparable to The Human, who can maneuver and dodge around the Greater Dog's barks, a sound based attack)

Transonic

Stamina: Superhuman (Could chase the human through several areas in the game without tiring, only truly tiring due to the exposure of heat in Hotland)

Range: Extended Melee with spear, Tens of Meters with magic attacks

Intelligence: Average Intelligence

Knowledge: Expert level (Leader of the Royal Guards and constantly held in high regard by people. A combatant trained by Asgore himself)

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Powers and Techniques

General Monster AbilitiesUnique AbilitiesUndyne the Undying

• Irregular Physiology (Monsters physiologies show they are mostly made of magic, noting that humans have a "physical form", along with having their SOUL directly attuned to their body)
• Magic (All monsters are made of magic and can use and express themselves through magic)
  • Curtain Fire (Monsters can use their magic to make bullet-pattern cards. Monsters are able to develop a large sum of magical attacks to overwhelm the opponent)
  • Creation (Monsters can make weapons, clothes and even food from magic)
  • Personal Domain & Battlefield Removal (When one encounters a monster they get into a fight, a FIGHT is an encounter in a monster's personal domain allowing them to fight humans, this has various rules such as turn-based combat)
• Limited Spatial Manipulation
  • 3-D: Monsters can at times influence the battle box)
  • Transmutation & Healing (Monsters can turn their attacks into healing projectiles)
• Absorption (Monsters and humans can absorb the SOUL as long as the person isn’t the same species as them)
• Non-Standard Interaction
  • Metaphysical Interaction: All monster attacks in Undertale are to the SOUL.

• Resistance to
  • Soul Manipulation (All monsters bodies are attuned to their SOUL thus they are effectively taking hits to their SOUL whenever attacked)

• Skilled in Hand to Hand Combat (Trained by Asgore in hand to hand and weapons)
• Weapon Mastery
  • Spear Mastery: Undyne is a skilled user of a spear, being able to throw it with accuracy.
  • Sword Mastery: Shown to wield swords in combat.
• Weapon Creation (Undyne can create spears to throw at opponents or spawn underneath opponents)
  • Weapon Control
• Enhanced Senses (Despite the human navigating in total darkness in waterfall, Undyne can navigate them perfectly fine)
• Sheer Will & Limited Standard Determination (Undyne can utilize determination to a limited extent, such as turning her body into Undyne the Undying, and refusing death for a bit in a neutral fight)
  • Regeneration
  • Type: Willpower Based Regeneration
  • Source: Biological Regeneration
  • Capabilities: Undyne through sheer willpower can regenerate her body while it's melting apart.
• Energy Manipulation & Velocity Manipulation (Can turn the SOUL green making the opponent unable to move, this extends to their physical body as they can not flee from fights)
  • Soul Manipulation.

• Resistance to
  • Extreme Heats (Resisted the temperatures of the MTT Oven which is stated to heat over 9000 degrees Fahrenheit)

All previous powers and abilities to a greater extent

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Equipment

Spears

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Other

Standard Tactics: Undyne will utilize her spears in combat for various purposes. Including spawning them underneath the opponent to shower them in spears. Though Undyne is also an honorable warrior. She outright gives the human a spear to block her attacks. Even in her Undying state when fighting a genocidal maniac she seems to keep her warrior's code.

Weaknesses

• Monster Weaknesses: All monsters are weak to an attack with killing intent behind it and if a monster doesn't want to fight, they are weakened greatly.
• Unique Weaknesses: Her armor can make her overheat in areas as hot as Hotland.

Note

• Despite Undyne having determination considering what it does to her body and how monsters are naturally not supposed to contain much determination it is very unlikely she has many of the other abilities other determination users have even if there isn't another user with greater determination. A primary example is that she is not aware of resets like other determination users are.

Explanations

Monster Check Stats

Monster's check stats are quite dubious for a couple of reasons:

• Monsters like Glyde give off the implication that monsters are the ones listing their statistics.
• Mad Dummy has a defense stat listed of -40 but notes because they're a ghost physical attacks will fail. One could say the -40 comes from the fact that the dummy's body is that weak, however, the regular Dummy's check stats just has their DEF as 0, there's really no reason why the Mad Dummy should have far lower DEF stats especially during a pacifist route.
• Characters like Napstablook have a defense stat listed but you actually aren't lowering his HP he was just lowering it for you to be nice.
• Toriel's stats are listed at 80 ATK and 80 DEF, the same as Asgore's stats. Yet in one of the endings Unydne with her strength as stated by Sans literally threw Toriel out of the castle. Despite Undyne's stats being 7 ATK and 0 DEF. This would also imply characters like Papyrus are stronger then her as he has an 8 ATK and 2 DEF, and while she does admit Papyrus is pretty tough, it's never really implied to be that Papyrus is stronger then Undyne. Royal Guard members are also shown to have higher stats then her through this logic.
• Undyne the Undying has stats of 99 ATK and 99 DEF yet due to Mettaton's Invulnerable Body, they have a defense stat of 999.

On top of these, genocide route has the check stats differ too with confusing changes, while the human's killing intent is a reason behind this, some characters have their defense stats raise such as Papyrus'. There's also inconsistencies even in these routes, for example The Human at a level 3 killing intent one-shots Toriel yet The Human at level 13 can still only chip damage Asgore.

It should also be noted, the argument that Toriel sent Asgore flying with her fire, has an issue it was an off guard hit which it has been shown off-guard/betrayal kills can one-shot monsters as they lowered their guard.

Magic vs. Physicality

Monsters are mostly made of magic while human beings are mostly made of water making humans with their physical forms far stronger then them. However humans have lost the ability to use magic by proxy.

Monsters bodies being made of magic has their body physically attuned to their SOUL. Due to this, monsters that don't want to fight have their defenses weaken and one with more killing intent and crueller intentions will inflict more damage on them. This is due to a monsters SOUL being made of love, hope, and compassion.

Monsters bodies being made of magic also makes it where they do not possess enough physical matter to take concentrations of determination.

In the Undertale 10th Anniversary Livestream Gerson reveals that humanity once had magic too but creating the barrier that separated humans and monsters caused them to use up all their magic.

Battle Records

0 - 2 - 0

VictoriesLossesInconclusive

None.

• Pacifist/Neutral Human - Fight
  • Conditions: None.
  • Location: Waterfall/Hotland
  • Note: In the Pacifist Route the Human repeatedly had to flee from Undyne until she passed out from the heat of Hotland.

• Genocide Human - Fight
  • Conditions: None.
  • Location: Waterfall/Hotland

None.

Versus Threads

VictoriesLossesInconclusive

None.

None.

None.