Haruchiyo has a calm demeanor and rarely talks. He was extremely loyal and much nicer to those he follows and worships. However, it is later revealed that he is also quite manipulative and is exceptionally good at deceiving other people. Haruchiyo’s most notorious trait is his fanatical idolatry towards Manjiro Sano, believing Mikey to be his "king" (akin to the Chess King), and thus deserving of the utmost respect, loyalty and devotion.