Death Stranding: 21 WTF Moments You Need To See To Believe
14. Mama "Dies" Halfway Through The Game, Her Twin Takes Her Place
Margaret Qualley gives one of the best performances in Death Stranding as Mama, so it was pretty surprising to see her randomly killed off half-way through the game.
In the fourth episode, it's revealed that Mama is confined to her lab due to her child being a BT, the result of giving birth during a voidout.
Furthermore, we find out that Mama has a twin sister, Lockne, who the baby was originally intended for, but following the voidout, the two have become estranged.
Mama then decides it's time to allow her baby to pass on, and asks Sam to cut the umbilical cord binding her to her BT child. This ends up killing Mama, but not before she has a brief, emotional reunion with Lockne.
For the rest of the game, Lockne takes over in the Mama role - albeit severely reduced in presence - with the implication being that Lockne and Mama are both present within Lockne's single body.