Zellus is an Aurelus female Nobilious in Bakugan: Armored Alliance. She offers her power to Wynton Styles to fuse with Trox.
Zellus was discovered in hibernation in the Maze by Trox, Wynton, and Lightning, as they searched for a way to counteract the accelerated aging effect the Maze was inflicting upon them. Lightning awoke Zellus from her sleep, and, impressed by his boldness, agreed to fuse with Trox to combat the pursuant Sophie and her Fusion Bakugan. Following Sophie's defeat, Zellus reversed the aging effect, and entrusted her companion Etris in their care.