Domovoi Butler is a seven foot tall Eurasian man with a shaved head, who serves as a bodyguard, cook, and friend, to Artemis Fowl The Second. He has been with Artemis since the day the boy was born. His weapon of choice is a Sig Sauer, though he could kill someone a hundred different ways without the use of his weapons!

Butler is the only human to have fought a troll and won, and he has also taken out an entire LEPretrieval team, on the same day.

He studied under Madame Ko, and has a blue diamond tattooed on his shoulder to prove his worth as a bodyguard. There are only two men in the world better trained in the various martial arts than Domovoi Butler, and he is related to one of them. The other spends his days on an island in the South China sea, meditating and beating up palm trees.

Butler on wikipedia.