Maedomari

Maedomari is a friend and associate of Shunsuke Otosaka, working alongside Medoki as part of the group responsible for erasing Shunsuke's existence from the memories of Yuu and Ayumi Otosaka.

He is identifiable by his black hair, blue eyes, and the light blue vest he wears over a white shirt with a dark blue tie. Maedomari appears only briefly in the series, but his role places him firmly within the network of people tied to Shunsuke's time-altering plan — trusted enough to be involved in one of its most consequential steps.