Myoujin Ai (明神愛) and Arai Midori (新井ミドリ)
This young, inexperienced pair were sent after Soubi in the first volume. Unlike most of the other teams, Midori and Ai make numerous appearances across the series. They tell Ritsuka some key information, particularly in volume 7 when Midori explains how he can find Ai, and how it felt when they first met.
Their markings are on their palms.