Roo is the Root of all Evil and one of the oldest entities in the Universe. She is the "twin sister" and opposite to Good, her counterpart of Heaven. She is a looming threat in the distance that thrives off of the sins, regrets and mistakes of other beings. Roo is also a deceitful chessmaster, playing both Heaven and Hell effortlessly, benefiting from the perpetual disharmony between the spiritual realms.