Nathan Foster had investigated South Grant, from her birth to now, without missing a single detail.
The devastating blow that Vincent mentioned had simply never occurred.
The biggest blow to her was the death of Ian Grant and the disappearance of Stella Foster.
Vincent seemed to have thought of something at this moment and hastily said to Nathan Foster:
"Next time her alter ego appears, you must remember all the signs she shows and any reactions before it manifests. This will help me control and awaken her second personality."
"Okay," Nathan Foster agreed.
"It's best to keep her by your side all the time. I'm not sure to what extent her alter ego has developed or if it has subjective thoughts. From what you've said, it's likely a violent personality. If it emerges, it could be dangerous, both to her and others."
Nathan Foster fell into deep thought when he heard Vincent say to keep South Grant by his side.
