Cancer Halloween Costume Guide... Mother of Dragons Cancer is the mother of the zodiac, making Daenerys' character as the Mother of Dragons perfect! All you need is a Khal, or dragons to turn this into a couples costume. Sailor Moon Sailor Moon is the ultimate cancer costume! You can turn this into a couples costume by having a friend dress up like Luna, Sailor Moon's cat. Moon Goddess The goddess of the Moon in Greek and Roman mythology was a huntress and protector of animal