The Isle of Dawn - Chapter 1

Sentinekka, on her thirteenth birthday, the date known for the start of the typical journey in the seven realms, decides to bring her best friend, a fifteen year old who was never allowed to start her journey, through the exploration of the Isle of Dawn onwards...
But different and unexpected, positive and negative, heartbreaking and hilarious things can happen during every journey... What could our girl possibly encounter?
Well, why not find out?
(Read calmly, analyze as much as possible).