Tetra Chord (テトラコード) is the group of 4 female utaite who play voice acting as 4 original male characters. The group is produced by Yumeko, started from January 2016; while Kibareha is the community manager and Hazuki Yuu is the radio manager.
- Yumeko as Miura Natsuki (三浦夏輝)
- CHIHORI as Hayase Sorata (早瀬空太)
- Hazuki Yuu as Arisugawa Tsubasa (有栖川翼)
- Kibareha as Yuuki Kai (結城海)