Who is Meruem human?

Meruem had a rather humanoid build for an Ant. He was muscular and toned, despite his relatively small frame as compared to his servants. He had two long antennae on his ears and a large shell-like armor over his head that resembled a helmet. There were dark pigmented areas on his arms, legs, chest, and head.

Who kills Meruem?

Meruem didn’t live long after being born. While he was out and about gathering his Royal Guards and setting out to create the world he wanted, Netero and the others who infiltrated NGL met him in battle. After Meruem finished his fight against Netero, he ended up getting poisoned and died subsequently.