Sanzy

Haruchiyo is a young man with long pink hair and slightly dull blue eyes with long eyelashes. He has a similar appearance to his younger sister, Senju Kawaragi. He is usually seen in his Toswa form, wearing a black mask and a deadpan expression. He has a number of piercings in both of his ears, including two helix piercings and two earlobe piercings, for a total of at least four piercings on each ear.

As an adult, Haruchiyo has long hair that reaches his shoulders and wears a blue and purple formal suit. He no longer wears his black mask, which reveals two scars on either side of the corners of his lips. He also has a Bonten tattoo that can be seen on his right forearm.

When he was young, he had short hair, combed to one side and pulled back on the other side. He never wore a mask until he met Yasuhiro Muto. As for piercings, he only has them on his right ear.

As a teenager, Haruchiyo has a calm demeanor and rarely speaks. He is extremely loyal and kind to those he follows and worships.
As an adult, Haruchiyo appears to be more extroverted, outspoken, and loud. He is ruthless and displays psychopathic tendencies.
His most notable trait is his fanatical idolatry of Manjiro Sano, whom Haruchiyo considers his "king" and deserving of his deepest respect, loyalty, and devotion.
Another trait is manipulativeness. Haruchiyo is able to find people's weak points and use them for his own purposes. He creates the illusion of loyalty and care in order to win people over and gain their trust.