Jacquie was a season 1 side character, who appeared frequently throughout the season, and even was helpful at some times, but the writers decided to kill her off with Dr. Jenner at the CDC to show not only do people want to live, but would rather commit suicide than to survive.
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Top Ten The Walking Dead Characters That Were Killed Off Too Soon
Lily, the older sister of Tara, appeared in season 4 as a close and trusted ally to The Governor, and even growing an intimate bond with him. Lily seemed to be a capable woman with much character potential, but was killed off between season 4s episodes 8 and 9. Not only was her character wasted, but fans were actually looking forward to seeing her