Tsubomi Kido (木戸 つぼみ Kido Tsubomi) is the first member of the Mekakushi Dan and currently its commander. She is the younger sister of Rin Kido.

Although she is naturally kind, she is one of the most level-headed within the group. She is very short-tempered and has difficulty keeping other members, especially Kano, in line. Of course, while she may appear scary at first glance, due to her dark expression and "glare-like gaze," as stated by Kano,[13] she is very motherly, as stated by Shintaro, who is also impressed by her ability to stay calm around her friends.[14] She is often listening to music through her earphones