How does that influence a personality?
The retrograde planet aspects inform on the experiences of life that the native will live (according to the concerned house) and on the holds of conscience that will be joined there (according to the sign).
The retrograde planets don’t always mean negative fallouts of previous lives. If they are completely harmonic, it indicates that the functions of the planets in questions have been used well, that the native consisted well of the lessons of it.
Now, he can exploit the qualities of this planet like a grant and can tempt to perfect it more. It is therefore about a karma positive recompense.
A dissonant retrograde planet indicates the repetition of negative patterns that proves to be problematic. In past lives, the native had some behaviors (according to the nature of the planet concerned) that were prejudicial for him or for the other.
He tends to repeat these same behaviors, to meet the same problems, but he must not resign before them. He can have the impression that the misfortune falls unjustly on him, whereas it has the fruit of his past lives harvested only. It is here about a negative debit karma.