Hattori Tsubame (服部つばめ) is a Japanese idol and performer born on April 26 in Kanagawa, Japan, and a member of BELLRING Shoujo Heart. She joined the group on April 1, 2023 as part of the revived lineup, making her stage debut on April 16, 2023. Her member color is orange, and she is known by the nicknames Ohattori (おはっとり), Tsubame, and Hattori-chan.
Before joining BELLRING Shoujo Heart, she was active in the idol group Kokuu no Kalmia (虚空のカルミア) under the stage name Leia (恋愛), graduating on November 24, 2021. During the announcement period for the revived lineup, she briefly used the temporary name Pancake (パンケーキ) before her official stage name was revealed.
From a young age she was sports-oriented, participating in long-distance running, swimming, and softball, though experiences in school club activities later led to a period of withdrawal and lost confidence. Her interest in idols developed during high school, during which she discovered BiSH and was inspired by their individuality and intense performances. She later auditioned for the revived BELLRING Shoujo Heart after watching past live footage and feeling drawn to their expressive performance style. As a performer, she places strong emphasis on expressing emotion through live shows and continues to develop her vocal and performance skills within the group.
