User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-9703010-20130606145815/@comment-24339098-20130607113538

Technically speaking the seven consist of Romans and Greeks. The books never specify how many Romans or Greeks they need to close the Doors of Death, three Romans and four Greeks may be enough. Not bagging anybody I'm just saying your storyline has a few flaws.