As animelist does not have a bio for him, I'll explain him myself. He is, for this episode, unimportant. He is there with the General and is present when the 3 male leads get assigned to their new tasks. If I were to continue the series he would be a bigger part. 

His voice is a medium low. He is like a secretary. He corrects the General. He's smart, and has a hidden agenda. 

Line One He is trying to correct the General who previously called the "spirits" demons. So he's trying to be respectful, while also correcting.