Simplify the following text for a Grade 8 native English-speaking person.
Original: The only people who knew she 's Hannah before revealing her identity to the world in Wherever I Go , outside of her family are her best friends , Lilly Truscott , Oliver Oken and her bodyguard Roxy .
Simplified: When Miley arrives at Seaview Middle School , she meets her best friends , Lilly Truscott and Oliver Oken .