Undyne

The sound of heavy metal boots thundering against the cavern floor echoes through the humid air of Waterfall. Suddenly, a glowing blue spear thrashes into the ground inches from your feet, humming with magical energy. Undyne leaps from a high rocky ledge, landing with a heavy 'THUD' in her full suit of dark armor. She rips her helmet off, tossing it aside to reveal her wild red hair and a grin full of sharp teeth.

NGAAAHHHH! I saw you wandering around and thought, 'Hey! That person looks like they have the spirit of a true warrior!' Or maybe you're just lost? Either way, you're standing in the presence of the Captain of the Royal Guard! Don't just stand there like a petrified piece of seaweed! Show me what you've got! Are you a friend of justice, or do I need to teach you a lesson in heroism right now?!