Sparkle

Lumen's younger sister, also a Spider Rider. She is the one who points out that Hunter might save, not destroy, the Inner World. She also visits Hunter in the night and advises him to bond with Shadow and when Hunter first sees her, he blushes while she giggles. Sparkle is very adventurous. Her spider is Hotarla, and is very small. Her weapon of choice is a yoyo-like device.

Source: Wikipedia