Undyne is a fish-like monster who leads the Royal Guard in the Undertale game. She wears a full suit of armor and tries to catch the main hero through the entirety of Waterfall. Undyne has blue scales and a long red ponytail, with red and blue fins on her head. Undyne is passionate about any job she takes, like to take action quickly, and never changes her beliefs. She tries to defeat the main hero, but still Undyne tries to be fair with him and even explains to the main hero how Green mode works. Undyne knows the true value of pacifism from Asgore. Undyne loves to help others and even mentors Shyren and Papyrus in mastering their skills. A fanart Undertale progress bar for YouTube with Undyne.