He was born on January 23. He is a Sakuragaoka High School student in Class 1-1, and a member of the "Idiot Trio" consisting of himself, Enomoto Koutarou, and Shibasaki Ken.
Midori is described as the type of boy who is energetic and boisterous outside of a relationship, but inside he is more anxious, shy, and delicate. He acknowledges his insecurities when it comes to romance and seeks to become a much "cooler, manlier" person to stand by the person he loves. Midori plays guitar in his school's music club. When he graduates from Sakuragaoka, Midori continues to pursue a musical career, writing his own songs and performing in a small-time band as a guitarist and lead singer.
