Takatsuki Shiori
In the Black Rose Saga, Shiori returns to Ohtori Academy after being away, and meets up with her childhood friend Juri. She thinks Juri is still angry at her because she stole a boy away from her in the past. She thinks that the locket that Juri secretly wears is a picture of the same boy she still loves. But it is Shiori that Juri loves, and she disposes of her locket in an attempt to let go of her. When Shiori comes across the locket (via Mikage's intervention), she figures out Juri's true feelings. She becomes confused and somewhat disgusted, and ends up at the Mikage Seminar and as a duelist, using Juri to provide her sword.Once Shiori finds out about Juri's feelings, she uses this to manipulate her. For Shiori has always felt inferior to Juri, and when she finds that Juri loves her, she knows that she is now the superior one. She is the one who has control, and despite the fact that she still looks up to Juri, she is glad to have this power, which comes back to haunt both Juri and Shiori later in the series.
Quick statistics:
Birthdate: February 2 - Astrological sign: Aquarius - Grade: 10 - Blood type: B
Episodes of appearance:
#7 - Mihatenu Juri (Juri's Unfulfillment)
#17 - Shi no Toge (Thorns of Death) - Shiori's duel episode
#28 - Yami ni Sasayaku (Whispering in the Dark)
#29 - Sora Yori Awaki Ruriiro no (Azure Paler Than the Sky)
#39 - Itsuka Issho ni Kagayaite (Someday Shine With Me)