Priest

A priest is a special converting infantry trained by the Grand Alliance. After the Motovov siblings, including Polina Petrov, joined the SRAF and Team RWBY, so Mariya tells Team RWBY that she can know how to make an infantry that can convert enemies into allies that is alternative to mind control, then Viktor and Sergei Motovov can rebuild past Roman temples for priest to make Mariya and the Grand Alliance be able to train priests.

Priests are trained while wearing priest clothes, but can have Grand Alliance icons to make the priests serve for the Grand Alliance. Priests can heal allied units and convert enemy ones (make enemies into allies in without te usage of mind control).

Also, priests can convert enemy infantries, enemy vehicles, enemy buildings, enemy naval craft and enemy aircraft into allies if they can get more priests.

In battle, they can heal allies, convert enemies and can help the Grand Alliance to make enemies turn into new allies if Mariya knew Age of Empires and past history.

They will fight for Mariya Motovov, the Motovov siblings, Polina Petrov, and the rest of the Grand Alliance.