Iiko

Iiko (イーコ) is a friend of Saten Ruiko, who appears in Toaru Kagaku no Railgun (PSP game).

Toaru Kagaku no Railgun (PSP game)
While going to meet with Saten at a karaoke box, Iiko and her friend Kaburagi Yumi are attacked by the Disciplinary Guides, with Iiko being attacked first and knocked unconscious. Saten later arrives as the two are being carried into an ambulance.