Asagiri Reiko    

     Birthday: 1st January, Showa 27th Year - 1952
     Birthplace: Aichi, Japan
     Height: 159cm
     Horoscope: Capricorn
     Blood Type: O
     Gate Power: Gate of Bewitchment    
     Weapon: Whip
     School: Private Tategami High School, Class 3A
     Family:

Special--Name Pun:
The Relationship Between Their Last Names and Their Gates

This is another sophistic explanation, but oh well, this is only a thought...

The meaning of the word "Asagiri" is the "morning fog". And for those who watched the Anime version, Reiko's first illusion was the time she practiced her piano in episode 3: the misty lake...Er, that's what I can think of. So I hope those who can think of some more logical explanation tell me a better theory about this...