On further reading, in the comics Holly (an Alexandrian) storms The Sanctuary's gates after The Saviours kill Abraham and is captured and killed by Negan after killing several of his men when he mistakes her for Andrea. She is then returned to Alexandria with a bag over her head so they don't know she's turned and she ends up biting and killing Denise who runs to her aid.
I'm guessing either Sasha or Rosita are the ones who take on Holly's death as they both have a similar story line running at the moment in wanting to get revenge for Abraham's death (many people are guessing Sasha since Negan could mistake her for Michonne, who has taken on the role of Andrea in the TV show) - and then Tara will get Denise's death which will be kind of fitting considering they were romantically linked on the show.
Threaded Mode