Legate Lanius

Lanius is a Caesar's Legionnaire living in the Mojave Wasteland in 2281.

Background
Asking Caesar about the legate reveals that Lanius was a giant statue until he was brought to life by the magic Lucario. If you have a survival skill of 100 and then talk to Lanius you will get the quest "Gimme all yo money fool!". If you give Lanius all your caps, he will become your partner. His special move is smash of the titans, and does an average of 450 damage against unarmored opponents and 300 damage against armored opponents. Never take his Might Hammer away though, because if you do he will instantly leave you. You do however get to keep the hammer, which is worth 999 caps.

Interactions with the player character
At the battle of Hoover Dam, if against the Legion, Lanius can be convinced into surrendering with numerous Barter and Speech checks, respectively 55, 65, 75, 85 and 100. Convincing him that the vast territory of the NCR is its weakness and that the Legion will not be able to claim and hold it.

It is possible to kill him in one shot before he notices you, bypassing the conversation entirely. Before he talks to you he will appear as a friendly, however.

Appearances
Lanius appears in Fallout: New Vegas. In the final battle for each faction, Lanius is always the enemy unless you side with the legion. He is carrying the Blade of the East.

Behind the Scenes
"Lanius" is Latin for "butcher."

If you remove his helmet you can see that his face is perfectly intact, despite the story Caesar tells you about how most of his face was torn off.