Question: What fictional character featured in "SpongeBob SquarePants" first appeared in the episode "Tea at the Treedome"?

Context articles: Mr. Krabs
SpongeBob SquarePants (season 6)
SpongeBob SquarePants (season 4)
List of SpongeBob SquarePants guest stars
Carolyn Lawrence
Pearl Krabs
SpongeBob SquarePants (season 3)
Krusty Krab
Sandy Cheeks
SpongeBob, You're Fired

Mr. Krabs is a fictional character in the American animated comedy television series "SpongeBob SquarePants".
 He is voiced by actor Clancy Brown and first appeared in the series' pilot episode "Help Wanted" on May 1, 1999.
 The character was created and designed by marine biologist and animator Stephen Hillenburg.
The sixth season of the American animated television series "SpongeBob SquarePants", created by former marine biologist and animator Stephen Hillenburg, aired on Nickelodeon from March 3, 2008 to July 5, 2010, and contained 26 episodes, beginning with the episode "Krabby Road".
 The series chronicles the exploits and adventures of the title character and his various friends in the fictional underwater city of Bikini Bottom.
 The season was executive produced by series creator Hillenburg and supervising producer Paul Tibbitt, who also acted as the showrunner.
 In 2009, the show celebrated its tenth anniversary on television.
 The documentary film titled "" premiered on July 17, 2009, and marked the anniversary. "
SpongeBob's Truth or Square", a television film, and the special episode "To SquarePants or Not to SquarePants" were broadcast on Nickelodeon, as part of the celebration.
The fourth season of the American animated television series "SpongeBob SquarePants", created by former marine biologist and animator Stephen Hillenburg, aired on Nickelodeon from May 6, 2005 to July 24, 2007, and contained 20 episodes, beginning with the episodes "Fear of a Krabby Patty" and "Shell of a Man".
 The series chronicles the exploits and adventures of the title character and his various friends in the fictional underwater city of Bikini Bottom.
 The season was executive produced by series creator Hillenburg, while writer Paul Tibbitt acted as the supervising/co-executive producer and showrunner.
 The show underwent a hiatus on television as Hillenburg halted the production in 2002 to work on the film adaptation of the series, "The SpongeBob SquarePants Movie".
 Once the film was finalized and the previous season had completed broadcast on television, Hillenburg wanted to end the show, but the success of the series led to more episodes, so Tibbitt took over Hillenburg's position as showrunner and began working on a fourth season for broadcast in 2005.
 Hillenburg remained with the show, but in a smaller advisory role in which he reviewed each episode and offered suggestions to the show's production crew.
In addition to the show's regular cast of voice actors, guest stars have been featured on "SpongeBob SquarePants", an American animated television series created by marine biologist and animator Stephen Hillenburg for Nickelodeon.
 "SpongeBob SquarePants" chronicles the adventures and endeavors of the title character and his various friends in the fictional underwater city of Bikini Bottom.
 Many of the ideas for the show originated in an unpublished, educational comic book titled "The Intertidal Zone", which Hillenburg created in the mid-1980s.
 He began developing "SpongeBob SquarePants" into a television series in 1996 upon the cancellation of "Rocko's Modern Life", which Hillenburg directed.
 The pilot episode first aired on Nickelodeon in the United States on May 1, 1999.
 The show's ninth season premiered in 2012, and episodes of "SpongeBob SquarePants" have aired.
 A feature-length film adaptation of the show, "The SpongeBob SquarePants Movie", was released in 2004; in 2015, a sequel, "", was released.
Carolyn Jean Lawrence (born May 21, 1964) is an American actress and voice actress who is known for her long-running-role as Sandy Cheeks on "SpongeBob SquarePants".
Pearl Krabs is a fictional character in the American animated television series "SpongeBob SquarePants".
 She is voiced by actress Lori Alan and first appeared in the season one episode "Squeaky Boots" on September 4, 1999.
 She was created by marine biologist and animator Stephen Hillenburg, who was inspired to design a whale character while supervising whale watches at the Orange County Marine Institute in Dana Point, California.
The third season of the American animated television series "SpongeBob SquarePants", created by Stephen Hillenburg, aired on Nickelodeon from October 5, 2001 to October 11, 2004, and consists of 20 episodes.
 The series chronicles the exploits and adventures of the title character and his various friends in the fictional underwater city of Bikini Bottom.
 The season was executive produced by series creator Hillenburg, who also acted as the showrunner.
 Hillenburg halted production on the show to work on the 2004 film adaptation of the series, "The SpongeBob SquarePants Movie".
 After production on the film, Hillenburg resigned from the show as its showrunner, and appointed staff writer Paul Tibbitt to overtake the position.
 Season 3 was originally set to end the series after the release of the film, but the success prevented the series from ending, leading to a fourth season.
The Krusty Krab is a fictional fast food restaurant in the American animated television series "SpongeBob SquarePants".
 It was founded by Mr. Krabs, who is also the owner.
 The restaurant has two employees: SpongeBob SquarePants and Squidward Tentacles.
 Famous for its Krabby Patty sandwiches, it is a rival of Plankton's across-the-street restaurant The Chum Bucket and as a result, the character frequently plots schemes to obtain the Krabby Patty formula.
 The restaurant first appears in the pilot episode, "Help Wanted" and has since become a common setting in the series.
Sandra "Sandy" Cheeks is a fictional character in the Nickelodeon animated television program "SpongeBob SquarePants".
 She is voiced by Carolyn Lawrence and first appeared in the episode "Tea at the Treedome" on May 1, 1999.
 Sandy was created and designed by Stephen Hillenburg, the show creator.
"SpongeBob, You're Fired" is a television special of the American animated television series "SpongeBob SquarePants".
 It serves as the 11th episode of the ninth season and the 189th overall episode.
 The animation directors were the supervising director, Alan Smart and Tom Yasumi, and was written by Marc Ceccarelli, Luke Brookshier, and Mr. Lawrence.
 Ceccarelli and Brookshier also served as storyboard directors.
 The episode originally aired in Greece on July 3, 2013.
 In the United States, it aired on Nickelodeon on November 11.
 In this episode of the series, which follows the adventures and endeavors of the title character and his various friends in the underwater city of Bikini Bottom, SpongeBob gets fired from the Krusty Krab after Mr. Krabs discovers he can save a nickel by eliminating him.
 SpongeBob subsequently decides to apply at other restaurants.