Undyne is one of the strongest monsters to ever exist. She is from a game called Undertale, if you dont want spoilers then turn back now.
Long story short they woke up in the nexus and are trying to find a way out.
UPDATE: After
The_Lost_Soldier helped her get back to her universe, he convinced Frisk to turn back from genocide and when they reset another Undyne was created, so she decided to stay in the Nexus.
Abilities:
Green- Turns your soul green so you are unable to move, but have a magical shield to block attacks.
Undyne the Undying- When Undyne dies instead of dropping dead she Reforms back onto a much stronger form than before.
Spear- Main attack, launches a magical spear at her opponent that does heavy damage.
Friends:
The_Lost_Soldier : Undynes best friend and Lover.
Theme song(s):
Spear of justice :
https://youtu.be/d5OXXM79YhkBattle against a true hero :
https://youtu.be/aOUi8RAGeRQOther Images:
Undyne without armor.
Obviously Undyne the Undying.
