See how often they participate in the script: HERE.
Character Story: Fyer is the owner of a large cannon located on a pier in the middle of Lake Hylia. Tourists can pay a fee for a thrilling ride. When Link finds an ancient and huge cannon, Fyer fixes it for him and sends Link to The City in the Sky.
Race Story: Humans typically live peacefully with other races throughout all of Hyrule. The more specific Hylian race is a subcategory of humans. They can be differentiated by their ears -- Humans have rounded ears and Hylians have pointed ears.