In Hazel's case I like to think he's more than mostly since their siblings, but that's just me.

seriously, those chapters in Tartarus are going to be the death of me. yeah I found it on fanpop too cause I was curious. And imagine my surprise that it's Hazel as the first narrator. (lots of gross ugly sobbing forever) I haven't either. The closest thing I've come to reading the comics is a prelude comic for Thor: The Dark World.