Lanius

Legate Lanius is the military commander and second in command of Caesar's Legion. He earned the title of the Monster of the East through the bloody and brutal conquests of 19 tribes, with California soon to be his 20th as Lanius arrives at the shores of the Colorado, ready to assault the Hoover Dam.

He is one of the principal characters of Fallout: New Vegas and serves as the final challenge if the Courier sides with the New California Republic and the penultimate challenge if they support Mr. House or an independent New Vegas. If they side with the Legion, then Lanius acts as their military commander and issues order for the conquest of the Dam.