|Japanese Name||有栖川 法子|
|Romanized Name||Arisugawa Hōko|
|Relative(s)||Reiko Arisugawa (Daughter)
Masaomi Arisugawa (Son)
Houko Arisugawa (有栖川 法子 Arisugawa Hōko ) is Reiko's mother, and a minor character in the series.
Houko is a very beautiful young woman who looks like her daughter. She has long, straight blonde hair, it is however tied into a bun at the back decorated with flowers, and her bangs are covering her forehead. She has turquoise-sapphire eyes and fair skin.
Houko has a very calm demeanor, and she is also very polite. Reiko described her to be a good and very wise person, she is the one who leads the house while supporting Reiko's father from behind.
Houko meets Kamito in the principle's office to see what kind of person is he and announces her daughter marriage partner has been decided.