Soi:Real Name: Kaen Haku
Age: 19
Eyes: Purple
Hair: Red
First Appearance (Anime): Episode 30
Abilities: Lightning bolts, Bouchu magic
Height: 170 cm
Blood type: O
Birth date: 10/30 (October 30th)
Location of seishi symbol: Upper left thigh
Meaning of seishi symbol: Thorax
Affiliation: Seiryuu Seven
Soi is a member of the Seiryuu Seven, celestial warriors sworn to protect the Priestess of Seiryuu from harm. Of the Seiryuu Seven, Soi is the only female - however, she is obviously not to be underestimated because of this. Soi has a natural ability to control lightning and where it strikes, able to throw bolts from her hands or summon it from the sky to strike down an enemy. This alone makes her a formidable opponent. However, she also has knowledge of Bouchu magic - the ability of using sexual intercourse to increase or decrease someone's chi. This can obviously be used in positive or negative ways. Soi's ability to use Bouchu magic stems back to training from her childhood, which was, to say the least, not a normal one. Soi's parents sold her to a brothel when she was young, where she was treated as a prostitute for paying men. When she was 12, one particularly ugly incident involving a customer was prevented by Nakago, who had been passing through the area. Since that day, Soi has been in love with Nakago, following him and eventually joining him as a member of the Seiryuu Seven. It is this love for Nakago that motivates Soi against the Suzaku Seven.
Miaka and the others come into contact with Soi on their way to Hokkan, the land of Genbu, to retrieve an artifact called the shinzaho that is necessary to summon Suzaku. Soi attempts to stop the Suzaku Seven by summoning lightning to strike at the ship that they are on, throwing them into chaos and nearly drowning Nuriko, Miaka, and Tamahome in the process. Due to Miaka's use of Hotohori's holy sword, Soi is defeated, but comes back several times in the series to attempt to foil the plans of the Suzaku Seven.
Soi's love for Nakago is, unfortunately, never truly returned by Nakago, who is consumed with his own agenda to use the Priestess of Seiryuu for his own ends. Though she is their enemy, Soi harbors a secret envy for the love that exists between Miaka and Tamahome, as it is a reflection of what herself and Nakago could be. Her loyalty, however, is unswerving, and she holds first allegiance to Nakago at all times, something which she is always eager to prove to him.
