Episode 7

011145 is the seventh episode of The Promised Neverland anime. It aired on February 22, 2019.

Summary
Our heroic five form a tense alliance with Sister Krone after the confrontation in the forest. Sister Krone tells them that her one goal is to become ‘Mother’, and if they managed to escape it would give a reason for Headquarters to get rid of Isabella and put Krone in charge. Of course, no one actually believes this. Krone, Norman, and Emma play a tense game of wits, while Ray and Mother seem to be working on their own, separate, plans behind the scenes.

Plot
Sister Krone offered to join forces to eliminate Isabella, as well as cooperation in the escape of Emma and her comrades. The children see this temporary ally rather more as a threat than joined forces due to Krone's crazy nature and untrustworthiness. In order to acquire the intel they want, Emma and Norman cautiously head towards Krone's room. The two of them are being careful to not sli-up while questioning her, but Krone can completely see through them.

We discover Sister Krone having a number on her neck. 12-year-old girls who meet certain criteria apparently get a choice: shipped off with the boys, or train to become “Mamas” themselves. In exchange for not being eaten, they are given implants that stop their hearts if they ever leave the farm. In a way, they are given less freedom; some would rather be dead than never be allowed to leave.

Sister makes no bones about it: she’s willing to help them only so she can advance her career by becoming the new Mama. If the kids escape, Isabella is responsible, so helping them escape makes sense. During a late-night visit, Norman and Emma get to see the tracking device monitor up close (it’s not that precise), but there’s a lot of questions Sister claims to be unable to answer. All she can say is there are humans out there not being eaten, and if they successfully escape, they’ll have to “mix-in” with them. Sister arguably gets more usable intel from the kids then they get from her; she learns that they knew about the tracking devices, where they were, and how to break them. Cut to Ray, receiving a Polaroid camera just like one I once got for Christmas, as a gift for his good service to Mama. He puts on an act about being fascinated by photography, but pointedly leaves behind the photo he took of her.

At this point, Isabella suspects Ray of spying for her simply to lift any suspicion from himself, or whether she knows the camera contains parts he can use to defeat the devices. Perhaps Ray, Norman, and Emma are the first-ever truly significant threats to her control over the farm. Isabella envelopes herself in overconfidence.

As for Sister, it doesn’t take long for her to test her suspicions by searching Ray’s sleeping area. Instead of finding the camera or any other contraband, she finds a folded up note; one it would seem Ray left for her on purpose. We don’t get to read its contents, but they may be irrelevant, as Mama shows up right after she reads it with a second letter. Mama’s sayonara strongly implies it’s a letter dismissing Sister from the plant.