Kurenai

Background
Kurenai (Crimson), Benimaru's personal ogre bodyguards.

The 100 strongest among the 4100 hobgoblins under Benimaru’s command, evolved into ogres. These ogres were originally the goblins that belonged to the first village ( except  Gobta, Rigurd, and few others)  Rimuru saved. They are now Benimaru’s personal bodyguards, possessing A-Rank strength.

A group of A-Rank monsters focusing on strength and truly possessing ridiculous abilities. Raw-power-wise, they may only be at Gelmud’s level but the level does not mean everything. Their current "level" would match the Templar Knights. The captains of Crimson endured Hakurou’s hellish training. They are a very dependable force.

Trivia
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 * It was stated in Chapter 73, 100 Crimson members still at A-Rank and at Chapter 142 it was stated they already reach A-Rank.