The Sister and the Twin

Estella is new at camp. In just one day she is able to get into enough trouble that Annabeth and Nico both want her dead. She starts having dreams where she meets a new God, Oyens, who the Gods are sending to camp. Will Estella finally make a friend, or will she make another foe?
{ I do not own any of Rick Riordan's stories. Also this takes place during Trials of Apollo book 3, and his new book Sun and Star.}