Morinth is an Ardat-Yakshi, an asari suffering from a rare genetic disorder which causes her to kill her mates while joining minds with them. In turn she becomes smarter, more powerful, and deadlier after each coupling. She has spent centuries as a fugitive from asari justice, surviving by her wits and cunning. Her powerful biotic abilities, and talent for dominating the minds of others, have kept her alive despite the odds.