According to the search results, "daywalker" can refer to several different things:

• In South Park, a "daywalker" is a nickname for a person with red hair who can handle being in the sun without getting burnt.
• In Blade and Marvel Comics, a "daywalker" is a type of vampire or half-vampire who can walk in the daylight without harm.
• In general fantasy, a "daywalker" is someone who can go out in the sunlight, distinguished from vampires who cannot.
• In Monsters and Creatures Wiki, a "daywalker" is a child of a vampire and a human who is drawn to other living creatures and feels more comfortable when living in their company.

Its worth noting that the South Park definition is the most commonly cited in the search results.