She became an aide to Shu Mai sometime during the Separatist Crisis. In 22 BBY, Shu Mai and Cat Miin attended a Separatist meeting on Geonosis, who didn't know that Obi-Wan Kenobi was spying on them. When Kenobi was caught, he was sentenced to execution, which led up to the events that eventually became known as the Clone Wars.
In 19 BBY, Shu Mai and the rest of the Separatists and their aides evacuated from Utapau to Mustafar. On Mustafar, they were told by Darth Sidious that they would be given a reward for their efforts during the Clone Wars. This was actually a lie, in reality Sidious had actually sent Darth Vader to come slaughter them all. Once there, Vader closed the doors so that none of the Separatists can escape. Then he slaughtered Denaria Kee, an unidentified Neimodian, Po Nudo and Passel Argente. Seeing this, the rest of the Separatists, including Shu Mai and Miin started running for their lives. Vader then killed Nank Tun and then killed Miin. Mai was killed right after.