User blog comment:Darkcloud1111/The Rules of Death and The Son of Neptune/@comment-3971001-20110906201548/@comment-86.178.204.194-20110906221126

It could be an undead horse or percy could have persuaded it to let her ride it AND we dont know for sure if its a horse. I think shes a daughter of Pluto because the Zeus, Hephaestus, Aphrodite, Poseidon and Ares(Frank) slots are taken and that includes four boys so Im thinking theres gonna be three girls to even out the masculinity. I think a lot of fans want to see Annabeth as one of the seven and I think Rick will make her one.