Born into a Bo-Matoran village on coast of the southern continent, Lilla never felt she fit in with her so-called brothers. While they spent most of their time tending their gardens or exploring the jungles outside the village, she preferred the calm quiet of the tide pools and shorelines they mostly ignored. So when she ran into a group of Ga-Matoran traders from a neighboring village while floating out in the waves, she quickly realized the real reason for her feelings of unease in her own armor.

Traveling back with her merchant sisters, she took the name Lilla and began a new life in the village of water. While the Turaga was initially concerned, those worries soon vanished as Lilla became a cornerstone of the community, tending to the hydroponic gardens that helped feed the village during slow fishing seasons. And when their resident Toa fulfilled her destiny and became a new Turaga, she passed her power on to Lilla, transforming her into a new Toa of the Green.