Assertion: dawn | /r/HasProperty | introduced at the start of the fifth season
Facets:
Source sentences:
text: After years of foreshadowing[citation needed], Dawn was introduced at the start of the fifth season as part of a large in-story retcon: Characters accepted Dawn's presence as if she had always been there, and as if Buffy always had a sister, with only the audience aware that this was not the case.