Pisci always felt out of place in the orderly Ant Kingdom. After meeting Cenn, she truly blossomed into a troublemaker. Her new lifestyle was cut short when Maki rejected their team, and Team Snakemouth caught them harassing Amber. Maybe after her sentence is up, she'll go back to a quiet life.
She could be in the Ant Kingdom after they attempt to steal items from Amber, but the two bid a hasty retreat to a hideout at the Explorer's Association midway through.