The SoulTaker: Tamashii-gari - episode 8 - 22 May, 2001

Shiro reveals to Kyosuke that his older sister, Yui, is the actual leader of the Kirahara Corporation. Shiro says that his power-mad elder sister wants the Flickers so that she could finally find Runa. Also, Shiro tells Kyosuke that he could have saved his mother but decided not to because only the mental trauma that he experience was the only thing that could awaken his own dormant abilities as the "SoulTaker" mutant. Meanwhile, Komugi is about to fight Yui's new monster she calls the "SoulAnubis". (Source: Wikipedia)