Nice is the independent-thinking partner in the "Hamatora" detective agency. His partner is Murasaki. He is a minimum holder, his powers involve sound. In the anime, this power is called "Sonic Minimum", but in the manga it's called "Cannon Ball Minimum".

Spoiler

He also has a second minimum ability, the "Ego Minimum", which he got from the heart transplant from Art's little brother; Skill. The trigger for this minimum is hope and it has the power to amplify the ego of individuals, resulting in the birth of one's minimum, or give a person's ego back.