They are all named after gods. 1st: Yukiteru Amono = Jupiter 2nd: Yuno Gasai = Juno 3rd: Takao Hiyama = Vulcan 4th: Keigo Kurusu = Mercury 5th: Reisuke Houjo = Ceres 6th: Tsubaki Kasugano = Proserpina (The only one not mentioned in the theme) 7th: Marco Ikusaba & Ai Mikami = Mars & Venus 8th: Kamado Ueshita = Vesta 9th: Minene Uryuu = Minerva 10th: Karyuudo Tsukishima = Diana 11th: John Balks = Bacchus 12th: Yomotsu Hirasaka = Pluto Aru Akise = Apollo I feel like there's more than that though...