Caninoids have human skin with dog ears and tail, like the other animal-esque races, BUT can transform into that animal.
Dragons are racial ID 8796 and Serenity's dad is afraid of dragons.
Dragonoids exist.
Fallen Erinysi keep their Erinys powers, and so far we know, have different powers from Valkyries.
Paradjis and Niflheim... no clue, but could be planets in another plane of existence, maybe? Best ask her at some point.