Be a character. Or make a bio. You can be 3 people and an OC. To make the OC bio fill this out:

Name:
Gender:
Age:
Parents:
Weapon:
Boyfriend/girlfriend:
User:

Characters:
Annabeth: me.
Percy:
Grover:
Clarice: me.
Jason:
Piper: @Scrathygirl.
Hazel: @Queen_Of_Muffins.
Leo:
Frank:
Coach Hedge:
Athena:
Zeus:
Hades:
Hera:
Hermes:
Apollo: @T-Rexus.
Artemis: @PoseidonPower11.
Reyna:
Poseidon: @PoseidonPower11.
Thalia: @Malorygirl.
Luke:
Chiron:

OC's:
Name: Kitty.
Gender: Female.
Age: 15.
Parents: Ares and somebody called Gina.
Weapon: A silver sword.
Boyfriend/girlfriend: Leo.
User: malorygirl.

Just note that spoilers are legal here.