Willow and Xander thinking Buffy might be possessed whereas Giles explains she's likely affected by the fact she died is a good demonstration of the fact that they are teenagers and he an adult who has more experience but also that they are so exposed to the supernatural that to them it is the most obvious solution. Thirdly, it reflects an earlier version of the pedestal Buffy's friends put her own. She can't have trauma or face emotional consequnces, she's the slayer -> it must be a demon.

















