Sienna would step through the Kamui portal within the main chamber of the Base within the village hidden in the sound. She was only there for one reason, to drop off Ren's most recent acquirement from the land of Noodles. A scroll containing the village's secret techniques, or rather technique as it only had one, but it was one that they could use to better communicate with each other. Ren didn't know if Raijin would be able to use it himself, but Ren had already acquired the knowledge and could use it to contact the man if he needed. The main reason for the delivery was so that Tadara would have access to the technique, Genjutsu was after all the man's forte, and them being able to communicate with each other from across the world would ensure that the Light continued to operate despite his unavailability from being in Konoha or other locations. Sienna would move to find Tadara, giving him the scroll that Ren had entrusted her with as well a the note he had written asking that the man put the scroll in the library with the others once he had learned the technique for himself. After delivering the scroll, Sienna would move throughout the base to check in on Dai and Mei, mostly to see how things were progressing in Ren's absence while she waited for her brother to come pick her up or send her new orders.
UNPC post No exp
Delivering Land of Noodles Exclusive Scroll
UNPC post No exp
Delivering Land of Noodles Exclusive Scroll