Ayano was rescued and repeatedly tries to leave my colony, but collapses from hunger each time before reaching the edge.
The drug withdrawl and malnutrition modifiers make her movement slow, and hunger rate high. Also, even with a low food bar, she does not eat before leaving the colony, sometimes leaving below 30% food.
Workaround: Wall the pawn into a room with some food until they recover. This is not working for me in this case, because she is so incapacitated as to just starve in bed without intervention. Deconstructing the wall for each feeding is heavy micro, and there is a chance she will escape when the wall is open.
Workaround 2: Rescue and house the pawn in a temporary cell with bed right next to the edge of the map. The next leaving attempt will succeed.
Suggestion
Do not allow pawns to try to leave if
-Their food bar is low
-They have an active malnutrition
-They have a temporary condition (disease, withdrawl, etc) that increases hunger rate.
edit: Oh my god I kid you not, as soon as Ayano left her map edge cell to leave, she had a berserk mental break. Then 5 seconds later a pirate raid appears 10 tiles away from her. Even Cassie has her sting.
Edit2: Ayano was knocked down by the raiders but rescued and released safely. Two of the raiders are now my colonists. Story.