Demonic Servant

Demonic Servant (デモニッシュ・サーバント) is a skeletal swordsman in Sword Art Online, found in the Labyrinth of the 74th Floor of Aincrad.

Background
Found inside the Labyrinth of the 74th Floor, Demonic Servants are powerful monsters with high Strength stats and are capable of using Sword Skills, such as Vertical Square.

They are known to have a weakness against impact-type weapons, such as maces, and are strong against swords due to their skeletal type body.

Appearance
A Demonic Servant takes the appearance of a skeletal swordsman, over two meters tall and surrounded by an eerie blue light. It carries around a huge straight sword in its right hand and a round metal shield in its left.

Aincrad Arc
While exploring the Labyrinth of the 74th Floor, Kirito and Asuna encounter a Demonic Servant. The Demonic Servant then engages the two-person party in a fight, but is ultimately defeated by the duo.

Trivia

 * Two Demonic Servants appear in the opening scene of the Aincrad Arc. Kirito easily kills the first one in a hit and the second one in two hits.