Lumpy Space Princess

Lumpy Space Princess a.k.a. L.S.P, is the princess of Lumpy Space. She is an important minor character, as she is seen in multiple episodes. She has accidentally bitten Jake, making the basis for "Trouble in Lumpy Space". She is the second most popular princess, after Princess Bubblegum. In the episode "Ricardio The Heart Guy", she is seen receiving a Best Friend Massage by Ricardio. LSP is seen again in "His Hero", where she gets plastic surgery from Finn and Jake to fit into a swim suit. She sometimes uses the word "lumpin", or "lump", in place of profanity, which is probably profanity (it is likely to be slang for the way Lumpy Space People are made) in Lumpy Space, as her parents are horrified when she says "lump off". Lumpy Space Dad and Lumpy Space Mom are her parents. Although her voice does not sound too feminine, she is in fact a girl, as confirmed by her title. So far, she is the only character to call Princess Bubblegum "PB".

Appearance
Lumpy Space Princess looks like a floating purple cloud, like most Lumpy Space People. Her features do not appear very feminine, but she is indeed a female. She also has a yellow star on her forehead and sharp fangs. She is not seen wearing a crown, like the other Princesses. However, the star on her head may represent royalty, seeing as that the only other characters with that characteristic are her parents.

Abilities
Like most Lumpy Space People, she has no legs or feet, but can fly. Also, she can give someone The Lumps if she bites a non-lumpy person. She can choose not to float if she wants to. This is shown in the episode "Trouble in Lumpy Space", during the Mallow Tea Ceremony. The yellow star on her head grows dim, and she experiences the full effect of gravity. She then falls down and accidentally bites Jake.

Personality
Lumpy Space Princess acts like a spoiled funny teenage girl. She tends to lose her temper and make fun of people, but she can still be nice towards others. For example, in the episode "Trouble in Lumpy Space", she tried to assist Jake in his adventure of finding the cure for The Lumps. She's pretty sensitive, and cried when Finn lashed out at her when she insulted the "smooth posers", but she forgave him by asking him to dance when Finn apologized afterwards. Her best friend is Melissa, a pink lumper, who is currently dating Brad, her ex-boyfriend. She can also be very unmoved and uncaring as to what is going on around her, using the words "sure", "whatever", and "fine" very often. She seems to have a strange relationship with her parents, apparently swearing at them and, eventually, making her mother cry, causing her to be banned from the royal car. Angered at her inability to help Finn and Jake without the car, she calls her parents "horrible idiots". This may only contribute to the fact that LSP is a teenager. She also went to a prom coming dance,(which are thrown weekly) which hints that she may be in high school, but it is still unclear.

LSP seems to be aware of her shallow relationships with friends in Lumpy Space, as she refers to Finn and Jake as "real friends" as opposed to her "fake" Lumpy friends. This may be why she spends so much time outside Lumpy Space with other princesses of Ooo. She has a relationship with Hot Dog Princess, as shown in the episode "It Came from the Nightosphere".

Quotes
See Lumpy Space Princess/Quotes

Trivia

 * She is voiced by a man (Pendleton Ward, the creator of Adventure Time), even though she is female.
 * As of the episode "Trouble in Lumpy Space", she is banned from her family's royal car.
 * Many people think her name is Elispy Princess since the characters in Adventure Time call her L.S.P.
 * Melissa's contact on her cell phone is 'BFF 66'.
 * She has made her mother cry at least two times.
 * She briefly ran the Facebook page for Adventure Time from July 12, 2010 to July 20, 2010, then again briefly on July 26, 2010.
 * LSP has at least 66 friends, because Melissa is "BFF 66".
 * Her best friend Melissa's license plate says "Sxy Lmp" which obviously means "Sexy Lump"
 * She is similar to the cloud a Lakitu rides on from the Mario series since she floats like it.
 * LSP is made out of irradiated stardust, according to Pen Ward's Formspring account.
 * She wanted to be hot in 'His Hero'.
 * The star on her forehead makes her float

Also, it proves LSP is Spanish.
 * When Natasha (Adventure Time's character designer) was questioned about how LSP was made, she answered,"She's based on teenagers who live in Burbank. Lumpy space is based on Burbank... Which is kinda just like... A mall full of teenagers".
 * In the episode The Eyes, LSP is shown at her Quinceañera, which proves that she is fifteen years old.
 * According to Pen Ward's Formspring, sometime Lumpy Space Princess will 'party' with Marceline.