When Wadatsumi was carrying the Straw Hat Pirates from Itu Island to Yaw Island, Rubis jumped out of the sea along with Saphir and Emeraude, and then they sat on a stone of sea area between two islands. Their look appealing to Sanji, but they chose to attack him. Later, they said their names and positions in the Simon Pirates. Soon afterwards, she and two female fish-men started to plan vengeance on the Straw Hat Pirates for Gad's failure. Unfortunately, all three lost to them and just decided to jump into sea.
After the Straw Hat Pirates entered a cave in Yaw island, Rubis, Saphir and Emeraude battled them again. At the end of the battle with them, they still failed. After that, a Master of the Waters wanted to attack them. She and others were protected by Gad who arrived afterwards, as well as Sanji. After Gad's second defeat, she and three other fish-men went away from the cave.