In this book you are Agent Fowler's niece who comes to live with him for a while. And you already know about the Autobots.

Y/n means Your name

F/n means First name

M/n means Middle name

L/n means Last name

H/c means Hair color

H/l means Hair length

S/t means Skin tone

E/c means Eye color

F/s means Favorite snack

F/f means Favorite food

F/c means Favorite color

Y/C/n means Your Cybertroinian name

O/c means Optic color

S/c means Spark color

Also, Ultra Magnus might be a little out of character