[ As someone who comes from Ye Olde Fantasy Europe, and has continued to live into Fantasy 2017, Anzu has the potential to be your best friend, insofar as she is capable of forming friendships in any traditional sense. Either way, it's only practical that everyone have the highest possible degree of understanding of the current situation in order to best escape it, so she has no problem explaining anything Alalia doesn't understand, such as, say... ]

Explanation: It is called a lamp. Its purpose is analogous to candlelight, and it is activated using this switch. Demonstration: [ She flips the switch, and voila! Let there be light! ]