Question: What fictional character was portrayed by Rebecca Mader in "Once Upon a Time" on June 9, 2015? 
Sentence (from "Once Upon a Time (season 5)"): On June 9, 2015, the promotion of Rebecca Mader and Sean Maguire to series regulars was announced for the fifth season, portraying their characters Zelena / Wicked Witch of the West and Robin Hood, respectively, while a few days later, Michael Socha was confirmed to not be returning as a series regular as Will Scarlet / Knave of Hearts.
Relevant evidence: Yes