Crasher

Seen directly in It's Inside my Computer here's proof 2014.11.22.

Able to change their model.

In the original video, crashes the game by leaving the map

Crash the game by directly attacking the camera.

In INTERLOPER C: The Sky Crash Incident, standard Umbrella Man instances approach a player pawn and Model Mutilation it, crashing the running game instance.

In IL5 Portal RTX's int_menu pawn is shown to be able to change its model.