Lieutenant

He is a lieutenant in the Fallen Fang and he had never said his name. His weapon of choise is a weaponized chainsaw.

This Lieutenant is a different one from RWBY as he is an alternative version of himself in the alternative universe where the Beacons of Darkness exist.

Appearance
The Lieutenant has a muscular appearance and short black hair. He wears the standard pants and black gloves of other Fallen Fang members, but his forearms have metal guards. The Lieutenant also has a distinctive top with a collar that sticks up around his neck and lacks the buttoned look of the standard garb.

The Lieutenant also wears a custom grimm mask that covers his whole face and has red eyes with thin red streaks streaming to the bottom of the mask. On his left arm, he bears several black tattooed designs, which can also be found in Adam Taurus' mask.

It is unknown what type of Faunus the Lieutenant is. It's possible that his uniform covers his animal trait, or that it is a trait that can be hidden, similar to Tukson's claws.

Personality
Not much is known about him, but it appears that not only is he capable of leading many White Fang members, he also harbors a grudge against the Schnee family, expressing his satisfaction at the opportunity to kill one.

Additionally, he is shown to be very loyal and determined to the Fallen Fang itself

Weapons
The Chainsaw is a uniform dark gray in appearance and rather large, being almost equal in length to the Lieutenant's height, if not longer.

It is not shown to possess any special functions and is simply used in a brute-force application. It also possesses a fore-grip typical of chainsaws, but the Lieutenant is shown to be strong enough to wield it with only one hand.

Faunus Abilities
As a faunus, the Lieutenant possesses the ability of night vision, granting her the ability to see proficiently in the dark.

Weaknesses
Large number of enemies.