Strong and aggressive, but also compassionate and caring when she needs to be, Undyne is the former royal guard captain of the Underground before it was disbanded following the destruction of the barrier. Now she runs a gym in Denver, Colorado, situated next-door to her friend Alphys' new lab just below an apartment which they share. Since getting to the surface, Undyne's tried her hardest to mellow out a bit--but she isn't quite there, yet, and her personality is still as rough as ever. That doesn't mean she doesn't try, though, and she really is capable of calming down if she sets her mind to it.