PJO - Sibling

Story: Years ago, while the gods still agreed that Zues, Posieden, and Hades could not have half-blood children, Posieden broke this rule and had a child before Percy. When Zues found out, he went to deal with the problem personally. After the half-blood was supposedly dead, the gods forgot about it. Now, years later, Chiron found out that they were still alive. Main Characters: Percy, Tyson, Annabeth, Grover, Clarisse, Nico, Thalia, Chiron, Mr. D. (Add anyone I missed) YOU: You are Percy's and Tyson's half sibling who Chiron has found out is still alive. Choose your name, age, gender, appearance, etc. (Ignore the voice. Good luck, friends)