Erin Sena is one of the characters in Law & Order: Special Victims Unit. She is portrayed by Marianne Hagan. Appearances Monogamy This article is a stub. You can help the Law & Order Wiki by expanding it. Retrieved from "https://lawandorder.fandom.com/wiki/Erin_Sena?oldid=85483" Categories: Law & Order Wiki stubs Females SVU Characters Criminals Medical practitioners Community content is available under CC-BY-SA unless otherwise noted.