Meruem

Meruem (メルエム, Meruemu) was the most powerful offspring of the Chimera Ant Queen. He was known as the King of the Chimera Ants, and serves as the main antagonist of the Chimera Ant arc. One of the most developed characters in Chimera Ants's arc, abandoned his chimera nature by becoming more human and kind after starting a peculiar relationship with a human named Komugi.