An unremarkable world located far from regularly traveled trade routes, Lesuss is inhabited only by a small asari colony. The main feature is a monastery that houses a large population of asari with active or latent Ardat-Yakshi genes, a disorder that causes the death of anyone who mates with the afflicted asari. Although some of the colonists exiled themselves voluntarily, many were sent to Lesuss by their families to protect society from their deadly potential.
The monastery emphasizes individual sacrifice for the good of the community. Latent Ardat-Yakshi, as well as active sufferers who show that they can control their condition, may be offered a chance to reintegrate into asari society after spending sufficient time on Lesuss. Active Ardat-Yakshi whose psychological profiles show capacity for neither empathy nor reeducation are confined to the monastery for life.