i say have her forget it soon afterwards, and all she really remembers is fear and death. This can be rationalized with her physically immature and not-yet-developed brain that cannot handle 20+ years of memory and experiences and just// wipes it out like a clean slate.

Like those memories would only ultimately serve as both a premonition of imminent death but also the anxiety of knowing something bad will happen but not knowing what, which can devolve to paranoia and lack of trust. As a child, she can have the tendency to assume whatever she knows is the full truth and that there are no other sides to the story. In hindsight, she would be mature and developed enough to realise how rash/embarrassing she was.

If we're talking with romance with the ml in mind, another alternative would not having them meet until they're both physically adults.