Question: The character that Adria Arjona plays in "Emerald City" was created by which author?

Context paragraphs:
Emerald City (TV series): Emerald City is an American fantasy television series developed for NBC by Matthew Arnold and Josh Friedman, and based on the Oz book series written by L. Frank Baum, set in the fictional Land of Oz.  Directed by Tarsem Singh and starring Adria Arjona, Oliver Jackson-Cohen, Ana Ularu and Vincent D'Onofrio, "Emerald City" received a 10-episode order by NBC in April 2015, which premiered on January 6, 2017, with a two-episode debut, and concluded on March 3, 2017.  On May 5, 2017, NBC canceled the series after one season.

Pacific Rim: Uprising: Pacific Rim: Uprising is an upcoming American science fiction monster film directed by Steven S. DeKnight and written by DeKnight, Emily Carmichael, Kira Snyder, and T.S. Nowlin from a story by Guillermo del Toro.  It is the sequel to the 2013 film "Pacific Rim", and stars John Boyega, Scott Eastwood, Cailee Spaeny, Adria Arjona and Jing Tian, with Rinko Kikuchi, Charlie Day and Burn Gorman returning in their roles from the original film.  It is scheduled to be released on March 23, 2018, by Universal Pictures.

Adria Arjona: Adria Arjona Torres (born April 25, 1992) is a Puerto Rican actress.  She is best known for her role as Emily in the HBO television series "True Detective" (2015) and as Dani Silva in the CBS television series "Person of Interest" (2014–2015).  She starred in the NBC television series "Emerald City" as Dorothy Gale.

Emerald City Confidential: Emerald City Confidential is a 2009 computer adventure game conceived by Dave Gilbert, developed by Wadjet Eye Games and published through PlayFirst.  It follows the protagonist Petra, Emerald City's only private eye, as she is approached by a strange woman named Dee Gale.  Dee's fiancé is missing, and she is willing to pay Petra above the going rate in order to find him.  Lacking any other prospects, Petra agrees.  What starts off as a simple missing person case soon takes Petra deep into the seedy underbelly of the Emerald City's criminal underground and beyond.  She encounters many characters from the Oz canon and some new characters, learns several magic spells, and uncovers the answer to a dark secret that has haunted Petra all her life.

Emerald City (magazine): Emerald City was a science fiction fanzine published in print and on the internet by Cheryl Morgan.  She had assistance from Kevin Standlee and Anne Murphy.  The magazine published 134 regular issues and 6 special issues between September 1995 and October/November 2006.  "Emerald City" received several Hugo Award nominations during its run, winning once in 2004 in the Best Fanzine category.

Emerald City (song): "Emerald City" is a 1967 song by The Seekers about a visit to the fictional Emerald City from L. Frank Baum's Oz books.  Set to the tune of "Ode to Joy" from Beethoven's Ninth Symphony, "Emerald City" reached #49 on the UK Charts in 1967.

Dorothy Gale: Dorothy Gale is a fictional character created by L. Frank Baum as the main protagonist in many of his "Oz" novels.  She first appears in Baum's classic children's novel "The Wonderful Wizard of Oz" (1900) and reappears in most of its sequels.  In addition, she is the main character in various adaptations, notably the classic 1939 film adaptation of the novel, "The Wizard of Oz".

Ghostdini: Wizard of Poetry in Emerald City: Ghostdini: Wizard of Poetry in Emerald City is the eighth studio album by American rapper and Wu-Tang Clan-member Ghostface Killah, released September 29, 2009 on Def Jam Recordings in the United States.  He first announced the album in a May 2008 interview, describing it as an R&B-inspired album, similar to his previous work with such artists as Ne-Yo and Jodeci.  The album spawned four singles; "Baby", a slow-tempo R&B song with auto-tune vocals by Raheem "Radio" DeVaughn, "Forever", "Let's Stop Playin'" featuring John Legend, and "Guest House", featuring Fabolous & Shareefa.  Upon its release, "Ghostdini: Wizard of Poetry in Emerald City" received generally positive reviews from music critics.  As of December 12, 2009, the album has sold 64,000 copies in the United States.

Jellia Jamb: Jellia Jamb is a fictional character from the classic children's series of Oz books by American author L. Frank Baum.  She is first introduced in "The Wonderful Wizard of Oz" (1900), as the head maid who works in the royal palace of the Emerald City which is the imperial capital of the Land of Oz.  In later books, Jellia eventually becomes Princess Ozma's favorite servant out of the Emerald City's staff administration.  She is also the protagonist of Ruth Plumly Thompson's novel "Ozoplaning with the Wizard of Oz".

The Belko Experiment: The Belko Experiment is a 2016 American horror film directed by Greg McLean and written by James Gunn.  The film stars John Gallagher Jr., Tony Goldwyn, Adria Arjona, and Melonie Diaz.  Filming began on June 1, 2015, in Bogotá, Colombia.  The film premiered at the 2016 Toronto International Film Festival on September 10, 2016 and was released in the United States on March 17, 2017, by Blumhouse Tilt and Orion Pictures.  The film received mixed reviews from critics and has grossed $11 million worldwide, against its $5 million budget.

Supporting paragraphs: Adria Arjona Dorothy Gale
Answer: L. Frank Baum