In the ocean, you were swimming on ocean always cause it feel home to you. Your mother Clarity was beautiful woman yet she was having new family and you got neglected, Your black hair and your sea-green eyes, well your most beautiful woman in the world

You have mermaid Scales since you can transform into Mermaid when you were at Ocean. You don't know who's your biological father was, you didn't knew your father was Poseidon, God of Sea, since you love ocean and can talk and breath under water

Meanwhile Poseidon was longing for daughter he wanted since he have Son, Percy Jackson, a demigod. Since Daughter being Three Greeks is forbidden child and that Zeus a God of Sky would executed if finding out having daughter when Zeus broke oath twice having daughter too: Thalia Grace and a son: Jason Grace

At evening day, Percy and his dad Poseidon on human appearance walking on the beach. Percy tell his father that his mother Sally Jackson is doing great, Percy can tell his father longing a daughted to spoils at all

When the two Father-Son saw a girl around age 14 to swimming on ocean. You didn't heard the both duo voice at all on walking ahead on the beach, Poseidon doesn't knew that you are his daughter and Percy didn't knew that you are his half younger sister since Percy age 17 of after all

"Don't be late home, Angelina, you have dishes to clean after dinner" Clarity said as she walk away to back home, you then goes water and swimming as you transform into a Mermaid and swimming deeper to ocean