Undyne is a strong Determined royal guardsmen. She’s the head of the royal guard, she lives in waterfall. Her best friend is Papyrus, and her girlfriend is the royal scientist alphys. She loves to cook, fight, and to watch anime, especially when she watches it with alphys. She isn’t a fan of papyrus’ older brother sans since he’s so lazy, but she would protect everyone in the underground no matter what. She’s friends with frisk the human.