Gennai Hiraga was the original figure who destroyed the White House and appears multiple times throughout the series. He unleashes a mysterious power in the form of green lightning bolts which is used in the series to cut the entire electricity supply of New York City, disable aircraft and destroy buildings in Washington DC. In the final episode at the I-Jin fortress, Yomiko and Gennai engage in a swordfight, using a lightsabre-type weapon and a paper sword respectively. He dies when Yomiko uses a $100 bill to rupture a liquid nitrogen coolant line, whereupon he is frozen solid and shattered.
Hige seems to know how to function the best in human society, even wearing a dog collar, although the true meaning behind his collar is revealed later in the series that is a tag/transmitter . He tends to use his intuition more than the others, but only when he's not thinking with his stomach instead. Hige is quite the ladies' man and is always on the look-out for a nice girl. He has the best sense of smell between the others. Hige seems to be a Himalayan wolf in the series. (Source: Wikipedia) Hige's name means "beard" or "whiskers" in Japanese.
Nagisa is a boy raised as a girl.
An old school friend of Ryousuke's father.
He was a noble man that helped Celiane and Apollonius fighting the Drak Angels until he betrayed them for his desire to become an angel himself. Beacuse of a vision, Reika thought that she was Celiane reincarnation but actually she is Scorpius reincarnation.
Kosaki's sister who is a school year younger. On her way to school, she is saved from some delinquents by a mysterious prince (actually Raku Ichijou) and ends up with his locket. Her first impression of Raku is negative as she observes that he is a womanizer who is trying to trick her sister and he is a pervert for looking at her panties. She also refuses to return his locket until Raku convinces her that he is helping the "prince." Unlike her sister, she is a good cook. She later reveals that she was helped by a guy in a mascot costume (also Raku) who treats her to ice cream. Later, she nurtures some feelings of love for Raku, but she later backs off, since she finds out that her sister, Kosaki, also has feelings for him. Instead, she decides to support her sister, despite her strong feelings for him.