See how often they participate in the script: HERE.
Character Story: A bookish character who has found his way into joining the small resistance group that meets at Telma's tavern. Rather than fighting, Shad reads and researches. He has a particular interest in completing his father's research on The Oocca, the legendary sky creatures.
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.