Di Angelo siblings

Soo! This was requested! Imma change it up a bit though. Your name is anything, but last name is Di Angelo (ex: my oc would be Oli Di Angelo, you get it). You’re the oldest of the Di Angelo siblings, however they have no idea about you and you have no idea about them, EXCEPT BIANCA. you and Bianca are twins, And are very close, however you left before Nico was born, Resulting in him having no idea bout you. Bianca never told him. Now, Years later, Nico and Bianca came to camp... You were there, Talking to Annabeth, as you had ran away and joined the runaway trio (or is it squad now???) (runaway trio: Luke, Thalia, Annabeth)