Shingo Mido (三堂 芯吾, Midō Shingo) is one of the eight members of the Yotsuba Group.
Mido has a short crop of brown hair that is combed more to the right side. He wears a small pair of black frame glasses. He is seen wearing a black suit with a white shirt underneath.
Mido is the Vice President of Corporate Strategy and the Director of Financial Planning at Yotsuba. According to Death Note 13: How to Read, he is a graduate of To-Oh University's Law department and his hobby is fencing. His only known relative is his father, Eigo Mido, a member of the House of Councilors. Despite his position within the company, the book also states that Mido dislikes finance.
He disagrees with Kira's actions and is an unwilling member of the Meetings of Death, pondering leaving the other board members. How to Read 13 states that Mido "seems" to have a "sense of appreciation" for Yotsuba.
Mido takes part in the Meetings of Death along with other members of the Yotsuba Group. He is eventually approached by Suguru Shimura, who is unable to go along with Kira's plans any longer. They hold a private meeting at Mido's house on the night of Higuchi's arrest and are later joined by Reiji Namikawa to discuss Kira's possible identity and make plans to attempt to stop him. They never take further action due to Higuchi's apprehension later that night.
A little over five months after L's death, Mido is killed by Light along with the other remaining Yotsuba Group members. At their last meeting, Mido was talking to Masahiko Kida, when he sees Namikawa and Shimura's death; Kida shortly dies in front of him. Mido, terrified by watching the deaths, attempts to run, but he gets a heart attack and dies, his body collapsing on the floor. In Death Note Relight 1: Visions of a God, he falls to his death from the top of a high building.
- In the manga, Misa Amane notes that Mido shares a resemblance to Light.