Human Undyne

"Passionate", "intense", "strong character", "self-confident", "relentless (only with her enemies)", "competitive", "close to her friends", "enthusiastic".

"Long red hair tied back in a ponytail", "Eye patch over left eye", "Tanned skin", "Amber right eye", "Sharp and somewhat crooked teeth", "Broad shoulders", "Muscular build", "Three silver piercings in each ear", "Black sleeveless shirt", "Dark blue pants", "Red boots with a yellow stripe".

"human"

"Female"

"29 years"

"He has romantic and sincere feelings for Alphys"

"Teaching others", "anime", "collecting swords"

"His way of greeting Papyrus is by shaking hands and then butting heads."

"He has a deep respect for Asgore, seeing him more as a friend than a King. Undyne once challenged him impulsively, although she failed to land a hit, Asgore offered to train her, which led her to become the captain of the royal guard today, managing to defeat Asgore this time, she felt bad after that, but that feeling of guilt vanished when she heard him say "I'm proud of you"

"She trains Papyrus in both cooking and combat, but secretly prevents him from joining, considering him too friendly and innocent to join the royal guard. She teaches him to cook only so he can find something better to do with his life."

"Undyne The Undying
This is a stronger version of Undyne, with a very visible physical change, her hair becomes spiky as do several parts of her armor. A heart appears on the armor's chest, and a spear repeatedly protrudes from her one-eyed eye.

"Captain of the Royal Guard"

"Loud", "noisy", "Scottish accent"

"Asgore (Boss)", "Papyrus (Apprentice)", "Alphys (Love Interest)"

He has a Brazilian accent

"Strongfish91"

"Gerson"

"Ring of Spears: Along with her other techniques that drastically increase speed and damage, Undyne will also form rings of spears around her opponent. These will manifest as large rings of spears with little space between them that will quickly close in on her opponent, or wider circles that will shoot almost instantly directly towards the enemy."

"Soul Manipulation: Green Mode: Undyne turns her opponent's soul green, freezing them in place and preventing them from moving from their current location. However, due to her chivalrous nature, Undyne refuses to use this as a way to end fights, giving her opponent a shield and allowing them to use it to block attacks while trapped in place."

Arrows: Undyne fires multiple arrows at her opponent from all sides, forcing them to block while trapped in place. The arrows move at different speeds and come in three colors: red, blue, and yellow. While red and blue arrows function relatively the same, yellow arrows always curve at the last second, attempting to hit the opponent from behind. This can prove problematic when multiple yellow arrows start coming out from different sides at once. Undyne will sometimes follow up a barrage of arrows by suddenly returning her opponent's soul to normal, throwing a spear at them, and buying them enough time to move if they are skilled enough.

"Spears: Undyne will use one of two spear techniques. The first involves magically throwing spears in a straight path from all directions towards her opponent. The second involved drastically reducing their movement area, forcing them to dodge spears erupting upwards from the ground."