Sirius and Apollo (mostly because Sirius is half of the reincarnation of Apollo's past life's soulmate; therefore, Sirius—along with Silvia—is Apollo's soulmate).
Tsugumi sees Reika with love background (flowers and sparkles) in one scene, and generally crushes on her. Unfortunately, Tsugumi's Psychic Powers react to her flusterment, so splodiness ensues.
Moral Event Horizon: Touma killing Baron in Episode 13 and the army scientists killing Futaba then using his feathers to create superhuman killing machines.
What Do You Mean, It's Not for Kids?: Hulu has this show in the "Family" category of their site. Not only is it aimed at adults due to it being a huge love letter to 70's/80's mecha shows, it has a substantial amount of violence and sexual undertones, including implied incest.