Sen (セン, Sen) is a kunoichi of Sunagakure and a teammate of Shira and Yome. Sen used to play with Yome and Temari when they were little. While still in the Academy, Sen and Yome watched from afar as Shira was mocked and ridiculed by their peers. Despite being banned from joining the Academy because of his lack of skills in ninjutsu and genjutsu, Shira continued to train himself in taijutsu. Sen and Yome ultimately came to admire the young man and were happy for him when Gaara, the new Fifth Kazekage, overturned the rules to allow Shira to attend the Academy.