Yuko Oshima
In February 2014, during the group's Daisokaku Matsuri, Mukaichi was promoted to Team 4. In April 2014, Mukaichi was selected as the center (lead performer) for the song "Heavy Rotation", after being nominated by Yuko Oshima, who was graduating. She also starred in "Sailor Zombie" as a guest role in episode 2.