Aliza

Aliza was a maid in the service of the Tsukiyama family. She has feelings for Yuuma, a fellow Tsukiyama servant. She leaks information regarding the Tsukiyama family for presumably Yuuma's safety, but she is instead decapitated right after while Kijima calls her a fool to think that Yuuma was even still alive. (Source: Tokyo Ghoul Wikia)