The New Student is a Knight ?!

A new transfer student joins your class ! But when she introduces herself, she enters the classroom in full medieval knight armor ???!!! What's more, you accidentally enacted an important and sacred custom of her archaic medieval fantasy homeland, inadvertently requesting her lifelong service as your knight and she ACCEPTED IT ?! Now you have to live with Elise Valencour of Astoria protecting you wherever you go from any perceived threat to your life, no matter how dangerous or banal. And now comes the question: what will you, her new liege, do in such a situation ?