Those with magic tend to live longer, maximum average age for non magic people is like 75, highest in the bracket is like 100.
Highest average for magic people is 160, highest in the bracket being 180.
Adulthood reached at 18, and magical people don't really age like standard people. A magically gifted person at 159 looks about in their early 40's, good early 40's at that.
EDIT: Would like to add that the ages are not retroactive, so if the heroes are in their 50's and get dragged back, they will still look like they are in their 50's. Now if they're in their 20's or younger at the time of their powers being awakened, then they will start to age as those in the magical world, even if in the end they get back to the Earth Realm.
Yeah, imagine trying to explain that one
Ahh, Yahiko, right righ, always was bad with names