Dolores' Mother is one of the unseen characters in the show. She seems to have smaller significance to Dolores than her husband Peter does. She also doesn't tend to leave her house at all.
Dolores' Mother is killed by Rebus and Walter in their Abernathy Ranch invasion loop. She is mentioned by Walter as he regrets they couldn't get use of her, to which Rebus replies that she is still warm.
In Dolores' flashback, in another host rotation, when Dolores returns to the ranch, the guests shoot her mother dead. It is very likely that after the events of the second season or Serac's orders, Dolores' Mother was either decommissioned or destroyed.
Dolores' Mother apparently dies 2 times on screen:
- Dolores' mother is never seen on screen. Additionally, she is one of a few characters to have no lines.