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One method would be to have her narrate things* in a straight-forward way but intersperse it with flashbacks (she probably has PTSD given what she's been through) and/or nightmares. After she meet...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/40414 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/40414 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
One method would be to have her narrate things\* in a straight-forward way but intersperse it with flashbacks (she probably has PTSD given what she's been through) and/or nightmares. After she meets other people, their words and actions will contradict some of what your MC says. For example, they might be frightened of her for "no reason." Or she will correctly narrate things but explain them wrong. For example, she describes someone else's body language accurately but then interprets it in a way your reader will not. Note: \* For some reason I'm seeing this as a first person book, which it may or may not actually be. Or at least as 3rd person but strongly from her POV.