User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4902593-20130914145422/@comment-4503464-20130916131246

He feels "empty" because RR made him the mysterious guy; The Sixth Ranger. And besides, Nico still has way more personality than Jason and Piper combined then squared.

SIDE NOTE: I'm going to be using the site TvTropes more often in my posts, because I fell in love with it and it has really good references to popular culture.