Ooi, Takeshi

尾々井剛

He serves as the Yotsuba Vice President of VT Enterprises. As the eldest and "most influential" member, he "appears" to control the conferences and individually contacts the committee members. How to Read 13 describes Ooi as "seemingly" a "tough guy who doesn't sweat the details."

Spoiler

Ooi is a graduate of the Law department at Wasegi University. He was a weapon enthusiast whose father worked in the Ministry of Defense.