Ater Team was an elite USEA Federation squadron. They utilized T-50 PAK-FAs as their aircraft of choice.
They fought against Task Force 118 over Area B7R, Nevada during Operation Battle Axe. In order to throw off their opponents' formation, they specifically targeted Nagase, marking her as the leader of the formation's core flight. All Ater units were then shot down by the other Task Force members, most notably Reaper and Omega.