沢城みゆき
is an analyst in the Public Safety Bureau's General Analysis Division and a latent criminal as well. She provides backup to the Enforcers and Inspectors in their investigation by analyzing the data and evidence sent by them. Being bisexual, Shion is at the moment in a long intimate relationship with Yayoi. Miyuki Sawashiro voices her in Japanese and Lydia Mackay voices her in English.