Sonata, a full blooded Aqurin, had lost her parents during the plantratery disaster of the Aqurin home world, Aqanicuis. Aware of her sensitivity to the force she was taken by the assassin corp of Darth Odium, formally known as the Jedi Shimmer. During her training Sonata had always kept a rather eerily cheerful demeanor to the unease of others around her. She had said very little and was especially hard to read. Neither the best nor the worst compared to her peers but one day during training only Sonata had appeared. Odium asked what of her peers, Sonata calmly replied, "They were planning on devouring you and would have destroyed the progress of the Sith. They were weak. So I devoured them first." Odium knew it wasn't entirely unheard of apprentices and the like to overthrow their master and it could have been possible. She had sensed this intention before but what is a Sith without ambition. Odium continued the training, though unsettled by Sonata's sudden compliance. With time Sonata had proven to be a deadly assassin and her hunger for Jedi was unrelenting. Odium had used her talents to cause unrest across many planets, revealing many opportunities for Odium twisted sense of peace. Including the "incident" that caused the riot on Haw'torn II.
Aqurin are an amphibious species and are capable of breathing underwater, they also posses seeking antennae. When in bare contact with a surface they are able to pick up on movement. This especially useful when preforming ambushes or tracking prey. Aqurin have a small frame compared to most near human species, this may hinder their constitution but provides them with flexibility and speed. Like many Sith assassins before her Sonata has developed the need to "devour", the abiltiy to drain the force from individuals assassin find the feeling intoxicating and hard to resist.