Question: What fictional character was portrayed by Rebecca Mader in "Once Upon a Time" on June 9, 2015? 

Context articles: Cara Castillo
Once Upon a Time (season 5)
Zelena (Once Upon a Time)
The Economist (Lost)
Rebecca Mader
Pamela Rebecca Barnes
Charlotte Lewis (Lost)
Wicked Witch of the West
List of Once Upon a Time cast members
Rebecca Howe

Cara Castillo is a fictional character from the original ABC and The Online Network soap opera, "All My Children".
 Amanda Hall Rogers portrayed the character for two episodes on June 9 and June 10, 2003, before being written off.
 The character was reintroduced, portrayed by actress Lindsay Hartley on December 9, 2010, until the series finale on September 23, 2011.
 In December 2012, it was announced that Hartley would reprise the role for the impending online reboot on April 29, 2013.
The fifth season of the American ABC fantasy-drama "Once Upon a Time" was ordered on May 7, 2015.
 It began airing on September 27, 2015, and ended on May 15, 2016.
 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.
 The fifth season also saw the series reach its 100th episode, which aired on March 6, 2016 as the mid-season premiere.
Zelena, also known as the Wicked Witch of the West, is a fictional character in ABC's television series "Once Upon a Time".
 She is portrayed by Rebecca Mader and was first introduced in the second half of the third season, serving as the new main antagonist.
 After making recurring appearances in both the third and fourth seasons, Mader was promoted to series regular for the fifth and sixth seasons and was the fifth season's secondary antagonist in the first half.
"The Economist" is the third episode of the fourth season and 75th episode overall of the ABC's serial drama television series "Lost".
 It was aired on February 14, 2008, on ABC in the United States and on CTV in Canada.
 The episode was written by co-executive producers Edward Kitsis and Adam Horowitz and directed by executive producer Jack Bender.
 In the episode's narrative, Sayid Jarrah (Naveen Andrews) and Kate Austen (Evangeline Lilly) negotiate for John Locke's (Terry O'Quinn) hostage Charlotte Lewis (Rebecca Mader), while physicist and "Kahana" crew member Daniel Faraday (Jeremy Davies) discovers that time on the island runs at an offset from the rest of the world.
 Another storyline follows Sayid working as an assassin after being rescued from the island.
Rebecca Leigh Mader (born 24 April 1977) is an English actress, best known for her roles as Charlotte Lewis in the ABC series "Lost", and as Zelena, the Wicked Witch of the West, on ABC's "Once Upon a Time".
Pamela Rebecca Ewing (maiden name Cooper; formerly Barnes) is a fictional character from TNT's primetime soap opera, "Dallas", a continuation of the original series of the same name which aired on CBS from 1978 to 1991.
 Rebecca was portrayed by actress Julie Gonzalo, and appeared on the show since its pilot episode, which first aired on June 13, 2012.
 A member of the Barnes family, the character originated in two episodes of the original series' season 12 (in which she was 5 years old), and also appeared in the TV reunion movie "" (which is not regarded as canon by the 2012 series).
 Pamela Rebecca was named after both her aunt, Pamela Barnes Ewing, and grandmother, Rebecca Barnes Wentworth.
Dr. Charlotte Staples Lewis is a fictional character on the American Broadcasting Company (ABC) television series "Lost", played by Rebecca Mader.
 Charlotte is introduced in the second episode of season four and is a cultural anthropologist on a mission to the island where Oceanic Flight 815 crashed.
 On the island she is initially held hostage by one of the plane crash survivors, John Locke (Terry O'Quinn), but is freed when another person from her team switches place with her.
 She helps prevent poison gas from being released over the island, and develops a relationship with Daniel Faraday (Jeremy Davies).
 Charlotte dies in Daniel's arms after the frequent time traveling causes her headaches to worsen into something unexplainable.
The Wicked Witch of the West is a fictional character created by L. Frank Baum as the most significant antagonist in his classic children's novel "The Wonderful Wizard of Oz" (1900).
 In Baum's subsequent "Oz" novels, it is the Nome King who is the principal villain; the Wicked Witch of the West is rarely even referred to again after her death in the first book.
Below is a list of actors and actresses that are or were part of the cast of the American fairy tale dramatic television series Once Upon a Time, and its spin-off Once Upon a Time in Wonderland.
 The show's current main stars are Ginnifer Goodwin, Jennifer Morrison, Lana Parrilla, Josh Dallas, Emilie de Ravin, Colin O'Donoghue, Jared S. Gilmore, Rebecca Mader and Robert Carlyle.
Rebecca Howe is a fictional character of the American television sitcom "Cheers", portrayed by Kirstie Alley and created by Glen and Les Charles.
 Rebecca appeared in 147 episodes of "Cheers" between 1987 and 1993 and in one episode of "Wings".
 She debuts in the season six episode "Home Is the Sailor" after Shelley Long—who played waitress Diane Chambers—left the show to pursue a movie career.
 Much of the show's humor in previous seasons had been based around the interaction and sexual tension between the womanizing, working-class main character, bartender Sam Malone, and the high-class, snobbish Diane.
 Rebecca was intended to fill the gap as Sam's new female foil.