User blog comment:Robykirby/How old is Nora?/@comment-24342832-20140516065000/@comment-3146930-20140516092536

I think we based most of the first-year student's ages on the fact that first years are about 17 years old. If I recall correctly, Ruby was said to be 15 and was bumped up 2 years, so the age for Beacon is 17.