Boogoo is a small, mysterious, and purple alien whose appearance resembles a cross between a jellyfish and an insect, complete with flight capabilities. Her character is introduced as a genetically engineered creation of the villain Dr. Jacques von Hämsterviel, designed specifically as a surveillance tool to spy on Stitch and his human companion, Yuna Kamihara. Initially, she is brainwashed and sent to Earth disguised as a harmless fruit fly with a specific mission to disrupt Stitch's good deed counter, a device that tracks his rehabilitation, causing his points to decrease for good actions and increase for bad ones.

Her personality is notably dual-layered. While she is generally friendly towards most people, she harbors a mean-spirited attitude specifically towards Stitch, frequently harassing him and stealing food from him, an act that deeply angers the food-loving experiment. Her communication is non-verbal, consisting primarily of physical gestures, insect-like chirps, and the distinctive vocalization "Boo goo!" from which she later receives her name.

Boogoo's role in the story undergoes a significant transformation. She is discovered by Stitch's creator, Jumba Jookiba, while he is repairing the good deed counter. Jumba is able to remove Hämsterviel's brainwashing, freeing her from her antagonistic programming. After her defection, she is taken in as a pet by the well-meaning but neurotic former agent Pleakley, who gives her the name Boogoo. She then integrates into the core family group on Izayoi Island, living alongside Yuna, Stitch, Jumba, and Pleakley, transitioning from a covert antagonist to a loyal, pet-like companion.

In terms of development, Boogoo demonstrates a growing bond with her new family, showing protectiveness towards Yuna and, despite her earlier meanness, Stitch as well. She participates in household activities and adventures, reinforcing her role as a member of the group. Her character arc concludes with the family relocating to Okinawa New Town, where she continues to exist as a background figure reinforcing the themes of familial unity and belonging.

Boogoo possesses several notable abilities, the most prominent being a shapeshifting power. However, she does not use this ability frequently. Notable instances include her debut episode, where she demonstrates the power, and a later episode in which she transforms into a parachute to save Yuna, Jumba, and Pleakley from danger. Beyond this, her inherent traits include flight and a diminutive, innocuous appearance that helped her initial mission as a spy.