User blog comment:Darkcloud1111/The Rules of Death and The Son of Neptune/@comment-4309444-20110907080739/@comment-4142691-20110907153649

I tend to find Darkcloud's theory the most likely, because I don't think Thanatos would willingly join Gaia. As the personification of non-violent death he is most likely neutral since people die on both sides and therefore can't pick either. Though she could indeed have taken him hostage, it wouldn't be the first time.