See how often they participate in the script: HERE.
Character Story: Husband of Pergie, father of Malo and Talo. He teaches Link how to use grass to summon a hawk, a very important skill for Link's journey.
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.