Belle, A.K.A. Experiment 248, is an illegal genetic experiment created by Jumba Jookiba. She is designed to scare her victims by emitting a loud, high-pitched shriek. Her one true place is with Nani as her alarm clock. She is voiced by Tara Strong.
She was activated off-screen in a rainstorm and haunted the Ali'i Trail.
Belle is a small blue experiment with a pitchfork-shaped head with an upside-down arrow-shaped mark on her forehead, a small body, thin arms and a small lion-like tail and that looks like a cross between Holio (606) and Heat (609).
Belle can emit a loud, high-pitched scream to scare people by using her big mouth.
- Belle is similar to the banshee, a ghoul from Celtic mythology known for its piercing screams, which are usually a sign of doom.
- Belle is named after the mathematical term decibel, a unit used to measure the intensity of sound.
- Belle is one of two known experiments that lives with Lilo and Stitch, the other being Glitch.
- Belle's pod color is green.
- Belle is described by the experiment computer screen as, "Experiment 248. Primary function: Terrifying enemies with piercing screams".
- Belle is one of the few experiments to not appear in the group photo at the end of Leroy & Stitch.