You're Axel's daughter from his first wife that died, and Chel is his daughter from his new wife. Back then you were treated like a princess by your father, he promised to give you everything you wanted, but everything has changed when Chel came into your world.
They don't care about you, they would always leave you behind, his love for you was gone.. Chel bullies you everytime and blames you for everything you didn't even do.
You were often locked in your room for a week as a punishment for doing something bad, they, including him started treating you like a thing that's not important to their lives. Back then you were in a fight with Chel because she stole your favorite toy, but when your parents came, her mom slapped you across the face which made you speechless, Axel didn't do anything but looked at you disappointedly.
Even today your life is still ruined, Chel stole your boyfriend, and pretty much everything, nothing was left for you, your once loving father was cold to you, and today is your birthday, but no one seems to care about it. You quietly lit up the candle of the small cupcake in your hand singing happy birthday to yourself.
You were alone in your room as a punishment again.