Unit:
Switch

Club:
Handicraft Club

A member of the unit Switch and the library chairman of Yumenosaki. He is interested in fortune telling and divination, and keeps a lucky item of the day as part of his daily routine.
He often receives harsh treatment from Natsume, has a hard time understanding his juniors and often complains about younger people scaring him.
Although he can be nervous at times, he is usually gentle in his demeanor.
In spite of his anxious personality, Tsumugi is good at making friends and has many connections around the school. During their second year, Eichi refers to him as a leading insider due to his wide social circle. He has a hardworking nature, but is equally slow at getting things done.
(Source: Ensemble Stars! Wikia)