Mugi is the main character in Hitohira. She is a very shy girl who has low self-esteem and will often says things are "impossible" if she thinks they are too much for her to handle. Despite being terrified about being the center of attention, she gets unwillingly drafted into the Drama Research Society but stays after she discovers the determination from the three older members of the club. Mugi especially admires Nono's determination after learning about her affliction with her vocal cords. When Mugi starts to panic, Nono can easily calm her down enough for her to carry out her acting duties. When stressed, or sometimes merely by chance, Mugi is submerged in delusions when she imagines herself in strange scenarios.

A transfer student Asai Mugi is a painfully shy girl. She is so shy that she can't speak when she becomes seriously nervous. However, for some reason, she is spotted and recruited as a member of the drama club.<br><br>
(Source: AnimeNfo)

Mugi Asai is an extremely shy girl, so shy that she becomes tongue-tied and even passes out when she has to speak in front of even a few people. Upon entering a new high school she is unwittingly pressured into joining the Drama Research Society, and due to the low number of members must act in a number of roles over the year. 