Information About Characters

Hey guys! Sorry that I haven't updated in a while. I'll try my best to start writing again. Well heres another story i've wrote.

So before we begin, there is some stuff y'all need to know:

~There are 8 years in high school
-2 years of Freshman
-2 years of Sophomore
-3 years of Junior
-1 year of Senior

Midnight is the daughter of Satan and she is 17 years old. When she turns 18, she has the chance to become the new ruler of Hell. Her older brothers support her but what bout the younger ones? Will this affect how Midnight wants to live as a human?