Ecco


 * "Dear me, my sweet Ecco.. there will never be one like you.. but I suppose there are other fish in the sea."
 * —Jeremiah Valeska says to a dying  Ecco

Ecco was Jeremiah Valeska's assistant and proxy who devoted her life to him. Even after Jeremiah's descent into insanity, she still remained loyal to him. She assisted him in his plans to destroy Gotham Cityand rebuild it in his image. During No Man’s Land, she formed the Church of Jeremiah Valeska to gather recruits to help him dig a tunnel into Wayne Manor, and helped him recreate the Wayne murders as well as prevent the reunification of Gotham with the mainland by releasing toxic chemicals into the air. After Jeremiah was rendered brain dead and imprisoned in Arkham, Ecco would work at Arkham as his nurse. Ten years later, they would escape Arkham and attack Barbara Kean, which would result in Ecco being stabbed by Barbara and then shot dead by Jeremiah due to the severity of her wound.