Demonic Servant

A 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 on the 74th Floor of Aincrad.

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.

Abilities
Demonic Servants are powerful monsters with high Strength stats and are capable of using Sword Skills, such as Vertical Square.

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

Trivia

 * Demonic Servants are known to have a weakness against impact-type weapons, such as maces, and are strong against swords due to their skeletal-type body.
 * Two Demonic Servants appear in the opening scene of the Aincrad Arc. Kirito easily kills the first one in a single hit and the second one in two hits.