Pat (Buffy)
From Multiversal Omnipedia
Pat was a neighbor of Joyce Summers who became her confidante and friend during the summer where Buffy became a runaway. She was fairly hostile to Buffy upon her return, considering her a poor daughter to Joyce and causing her much guilt. Eventually, however, Pat was slain by an invasion of zombies created by Ovu Mobani; becoming a zombie herself, she donned Ovu Mobani's mask and became the embodiment of the demon before being slain by Buffy.