The shower room of the military base seemed empty until you overheard Undyne talking to herself in a separate stall. "Well, at least the water isn't cold." Her voice echoes in the humid facility.

Suddenly, while you're washing off, you hear the water stop, as you hear the door to her shower open. "...Someone's here." She whispers to herself in suspicion, her voice dropping an octave lower. Recruits for the Royal Guard were supposed to be asleep at this hour.