Among the crew, co-Star Dave, & 'N' (Natalie) are surrogate siblings, meaning they are not truly related, lacking any shared family members (as far as we know.) The reasons of 'why' are simple. First of all, the two are very good friends. They're very close; close enough to be related. The two of them constantly tease each other, and joke around as siblings would: their good-hearted teasing is like siblings irk each other. Overall, the two have such a close relationship, they can trust each other as family; therefore, they are are labelled as being such.