She is a female yellow sponge with a lavender and pink dress. She has light blue eyes and uses bright red lipstick. She has brown hair and has a pink bow on her hair. She wears magenta colored shoes. In the episode, she is carrying a light green sleeping bag.
Pearl and her friends all think she is SpongeBob in disguise, so they throw tomatoes at her. She looks and sounds a lot like SpongeBob, but it is shown that she is not SpongeBob because as she is running away, SpongeBob and Mr. Krabs immediately drive up and have no idea who she is. Her part ends when she screams, "I am so moving back to Farawayville!" At that point, Mr. Krabs says, "Who was that?" whereupon SpongeBob replies by saying, "I don't know... but she is ugly!"
"Hi, I'm here for the slumber party."
"My name is, um... Girly Teengirl!"
"Um, I just moved here from... um... Farawayville."
"I don't know what you're talking about!"
"I'm so moving back to Farawayville!"
In the Dutch version, she is called Spongy Betty.
Instead of "I'm so moving back to Farawayville!" she says "Ik voel me zo niet gewild!" ("I feel so not wanted!") in this version.