Discovered to be Force-sensitive during infancy, Nicanas Tassu was taken to the Coruscant Jedi Temple for training in the ways of the Force. Tassu was selected to be a Padawan by a Jedi Master. After years of study and having constructed a green-bladed lightsaber for himself, Tassu went on to pass his Trials of Knighthood and was given the rank of Jedi Knight.
In 22 BBY, Tassu was stationed at the Temple when Master Mace Windu rallied all available Jedi to join an assault team in order to rescue the Jedi Obi-Wan Kenobi and Anakin Skywalker, as well as the Naboo senator Padmé Amidala from the Confederacy of Independent Systems. Arriving on the desert plains of the planet Geonosis, Tassu stormed the Petranaki Arena with his comrades in order to free the prisoners. Tassu was assigned to arm the two captured Jedi with the help of fellow Jedi Sephjet Josall. Rushing the arena floor, Josall and Tassu were able to pass on their spare weapons. Nicanas delivered a lightsaber to Skywalker, while Josall armed Kenobi.
Tassu was notable for his skill in Force jumping, which he used to cross great lengths and at a quick speed. The Force jump aspiring Jedi Luke Skywalker performed on Cloud City to escape a carbon-freezing chamber was as fast and high as one of the Force leaps Tassu could perform.
Wearing Jedi robes, Tassu wielded a green-bladed lightsaber in the Battle of Geonosis. He also had a spare lightsaber that had the same color which became his second sword and passed to Anakin.
Nicanas Tassu is a tuckerization of Nic Anastassiou, the crewman who played this character.