Ecco is the assistant, proxy and girlfriend to Jeremiah Valeska, also known as Xander Wilde. An excellent and skilled fighter, Ecco eventually serves as Jeremiah's henchwoman, after he undergoes his change into becoming a terrorist in Gotham, donning a harlequin outfit as her costume.
- The character is a direct precursor to the supervillain Harley Quinn.
- This version of the character is exclusive to the continuity of the television series Gotham and its tie-in webseries and shorts, Gotham Stories and Gotham: A City Gone Mad. It is an adaptation of Harleen Quinzel/Harley Quinn. The original character was created by Paul Dini and Bruce Timm and first appeared in the episode "Joker's Favor" of the series Batman.
- Ecco was portrayed by Francesca Root-Dodson.
- 8 Appearances of Ecco (Gotham)
- 4 Images featuring Ecco (Gotham)
- 2 Quotations by or about Ecco (Gotham)
- Character Gallery: Ecco (Gotham)