Íko

Íko (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, Íko and her friend Kaburagi Yumi are attacked by the Disciplinary Guides, with Íko being attacked first and knocked unconscious. Saten later arrives as the two are being carried into an ambulance.