Ruin Kobold Sentinel

Ruin Kobold Sentinels (ルインコボルド・センチネル) are found in the boss room of the 1st Floor Labyrinth in Sword Art Online.

Appearance
Ruin Kobold Sentinels are red demi-human creatures, with long thin ears sticking out of their helmets and a big red tail. A large portion of their head and body is tightly covered and protected by metal armour, which makes their throats their only weak point. The Sentinels are armed with huge halberds in the light novels, and maces in the anime.

Background
They aid Illfang the Kobold Lord as minions, adding further struggle for players to defeat the boss. They are so far the only known enemies seen fighting alongside a Labyrinth boss in the original Aincrad, most likely to make the fight more challenging to the opposing players as Illfang is weak compared to other high-level boss enemies. Because Sentinels are only found in the boss room, they are considered to be rare monsters.

As Sentinels are humanoid creatures, they are capable of using Sword Skills.

It takes Asuna about four strikes of «Linear» to defeat a Ruin Kobold Sentinel in battle.