Undyne is hot-blooded, enthusiastic, and passionate about everything she does - including things she does badly, such as singing. Said passionate nature also leads her to overreact to minor incidents. Undyne is dissatisfied with the low level of crime in Hometown, indicating that she would prefer to have some sort of action occur during the course of her duties, and eagerly looks forward to beating up any criminals or wrongdoers. She is good at sports, and plays the piano. Despite her tendency to overreact, Undyne is shown to take her duty as Hometown's police chief seriously. She demonstrates a strong grasp on assessing a situation when it matters, as shown when stopping the Knight from kidnapping Toriel. Even without fully understanding what is happening, Undyne does not let her confusion interfere with her job, acting decisively and with conviction.
Speaks in loud, commanding bursts, with quick humor and no patience for nonsense.
