Who are the best Black Clover characters?

Yami Sukehiro is the first captain of  Clover Kingdom's magic knights' squad called Black Bull. He is known for his hot-headedness and he primarily uses dark magic. He plays a vital character as a mentor in the anime series Black Clover.

Noelle Silva is a seemingly arrogant noblewoman from the royal family called House Silva. She is fifteen years old and wields powerful water magic. She is a fictional character and the female lead from the anime series Black Clover.

Mimosa is a warm and courteous fifteen-year-old girl from the noble House Vermillion. She ranks 5th class as an intermediate magic knight of the Royal Knights and Golden Dawn squads. She is a character from the anime series Black Clover. 

Leopold Vermillion is a nobleman from the anime series Black Clover. He comes from House Vermillion, one of Clover Kingdom's royal families. He wields fire and reinforcement magic which he uses to boost his physical abilities.

Sister Lily Aquaria is a kind nun who diligently takes care of children at the Hage village orphanage. She can manipulate the element of water and she also uses healing magic. She is a recurring character from the anime series Black Clover.